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Cris Sira
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What if dopamine isn’t about feeling good?One molecule. Many stories.
We are surrounded by dopamine. Or, at least, by conversations about it. “This gives you a dopamine hit.”“Do a dopamine detox.”“Social media is frying your receptors.”“If you want to get your motivation back, stop overstimulating yourself.” And after hearing it repeated so often, we’ve ended up turning an extraordinarily complex molecule into something resembling an internal drug that appears whenever we experience pleasure. But dopamine is not the happiness molecule. It isn’t

Cris Sira
3 oct7 min de lectura


The Action Potential: The electricity that makes us feel, think and move
There is an idea that seems almost mystical, yet is deeply biological: Every cell in our body is electrically charged. Every living cell maintains an electrical difference between its inside and outside. And millions of years ago, neurons learned to use that difference as a way of communicating. Thanks to this, we can think, remember, feel, sing... All of it begins with tiny electrical signals moving through the nervous system. A neuron at rest is not switched off. It is wait

Cris Sira
18 jun5 min de lectura


DNA: The invisible library building you at this very moment
What if some of the things you call “you” began long before you even existed? Perhaps we don’t start from scratch.Perhaps we are the continuation of something that has been unfolding for a very long time. But continuing doesn’t mean repeating. We, too, leave our mark on that story: we can give a different shape to what we inherit, open paths that didn’t exist before, and leave something different for those who come after us. We are inheritance, yes. But we are also possibilit

Cris Sira
14 jun5 min de lectura


Vulnerability: The most human strength of the brain and soul
The deepest truth is often gentle, trembling, human. A truth that dares to reveal its cracks and doubts is not weak: it is brave. Because allowing ourselves to be vulnerable is an expression of immense trust in ourselves and in life. Revealing what hurts, acknowledging what we do not know, accepting what we feel… all of this requires a powerful kind of faith. Faith that authenticity does not destroy us, but sets us free. Faith that we do not need armour to be strong. Vulnerab

Cris Sira
12 oct 20253 min de lectura


The invisible rhythm that keeps us alive.
Everything in life has a rhythm. The light that rises each morning, the silence that settles at night, our heartbeats that never stop. Nature LOVES rhythm. Flowers know this. They open when the sun calls them… and close to rest when darkness falls. The hibiscus is a perfect example. Its bloom is brief, intense, almost fleeting. Sometimes it lasts just a single day. But in that moment, it expresses its entire life cycle: TO OPEN, TO SHINE, AND TO WITHDRAW. This movement is not

Cris Sira
5 oct 20253 min de lectura


What neuroscience reveals about eating behaviour
Why do we eat when we are not actually hungry? Why can we finish a meal feeling completely satisfied and still somehow find room for something we find irresistible? Why does listening to our body feel easy on some days, while on others it seems as though food is making the decisions for us? Perhaps because eating has never been just about eating. Behind something as ordinary as opening the fridge, choosing a food or deciding that we have had enough, there is a constant conver

Cris Sira
5 oct 202512 min de lectura


The illusion of control: when the body knows before you do
Who is really moving our body? Are we the ones deciding every gesture, every step, every action? Is the brain in charge? Or are our habits, our history and our nervous system making decisions before we even become aware of them? The question seems simple, but the closer neuroscience gets to it, the more complex the picture becomes. Because there is something our ego finds uncomfortable: very often, the body knows before we do. Imagine you are walking through a forest. Suddenl

Cris Sira
23 jun4 min de lectura


The revolutionary act of being
Have you ever found yourself in a group where everyone is doing the same thing, yet deep down, no one really wants to be there? There is a reason for this. Our social brain fears exclusion more than it fears inconsistency. And so, without even realising it, we often fall into automatic behaviours that help us belong. Because at a neural level, rejection can be experienced as a real threat. From an early age, we learn which emotions are acceptable, which desires are considered

Cris Sira
1 mar3 min de lectura


Dopamine, ego and purpose
Why do I do what I do? And what for? Without trying to answer these questions honestly, you can spend years living on autopilot. Doing. Achieving. Accomplishing. Winning. And yet, still feeling an emptiness that is difficult to explain. When the goal is simply to win — recognition, approval, status, security, love — you step onto a wheel that never really stops. The wheel of doing to be enough. The wheel of doing to fit in. The wheel of doing to be loved. And that wheel, howe

Cris Sira
28 feb5 min de lectura


If you have to hide to be seen, it’s better not to be seen
“If you have to hide to be seen, it’s better not to be seen.” This phrase is not about invisibility. It is about dignity. From an early age, we learn — sometimes without even realising it — that in order to be accepted, we have to cut away parts of ourselves: turn down the volume on what we feel, keep quiet about what we think, hide what makes us different… The message is subtle, but constant: be yourself, but not too much. And so begins a silent negotiation with our identity

Cris Sira
20 dic 20253 min de lectura


The mind lies: How to turn resistance into action
Sometimes, achieving a goal isn’t just about willpower. It’s also about the conversation we have with ourselves. And that conversation can change from one day to the next: some days it encourages us, while on others it sabotages us, confuses us or pushes us to give up before we’ve even begun. Something interesting happened to me today. At first, it seemed insignificant, but it ended up teaching me a huge lesson. I wanted to study. I genuinely did. I love learning, I love disc

Cris Sira
29 nov 20253 min de lectura


Bare. Feeling MORE doesn’t mean feeling TOO MUCH.
Today, there is a lot of talk about highly sensitive people (HSPs). They are classified, categorised, labelled. But perhaps the name is the least important part. Because beyond all the categories, the truth is that some people perceive a little more than what is immediately visible. From neuroscience, we know that these people have a more responsive nervous system: areas of the brain associated with empathy, emotional awareness and sensory processing — such as the insula and

Cris Sira
30 oct 20252 min de lectura


To wait, to desire, to imagine… Is also part of who we are.
We live in a time when we are constantly told that “to be happy, we shouldn’t have expectations”. That the key is to flow with life, accept whatever comes and expect nothing from anyone. Although this idea may be well-intentioned and seem liberating, it can sometimes become a subtle way of denying something deeply human within us. Because waiting, desiring, imagining what might come… is also part of who we are. From a biological perspective, the human brain is designed to ant

Cris Sira
28 oct 20252 min de lectura


Neither immune nor perfect: Understanding the mind doesn’t free us from our own.
Studying the human mind doesn’t mean being able to solve everything perfectly or always feeling balanced. It means, rather, being committed to the ongoing process of understanding the human mind — including our own — and approaching that process with humility. Those of us who spend time trying to understand suffering, behaviour or emotions are not immune to them. Theory doesn’t protect us from vulnerability; if anything, it often makes us more aware of it. “All that psycholog

Cris Sira
28 oct 20252 min de lectura


Personality as a bridge between biology, consciousness and life
For a long time, personality was considered a collection of fixed and relatively stable traits. Today, however, we understand that these traits are dynamic tendencies that can develop, integrate and transform over time and through experience. Far from being an unchangeable structure, personality is a living system, sensitive to our environment, our personal history and the level of awareness we have of ourselves. What’s more, traits are not inherently positive or negative. Ea

Cris Sira
21 oct 20253 min de lectura


Spirituality: The art of coming home
“Keep your feet on the ground, but let your heart soar as high as it will.” — Arthur Helps Almost a century ago, Carl Jung observed that many men and women of his time were struggling with a profound sense of emptiness and hopelessness. He referred to this as “the spiritual problem of modern man”. Now, well into the twenty-first century, that idea still resonates: we live surrounded by stimulation, yet often disconnected from ourselves. And it is precisely here that spiritual

Cris Sira
5 oct 20253 min de lectura


Move!
Do you want to feel better? Exercise. Do you want to have more energy? Exercise. Do you want to have better health? Exercise. Do you want to feel agile and young? Exercise. Do you want to sleep better? Exercise. Do you want to have better sex? Exercise. Do you want to improve your concentration? Exercise. Do you want to take care of yourself and love yourself? Exercise. Do you want to appreciate and value your body? Exercise. Do you want to build your discipline? Exercise. Ex

Cris Sira
5 oct 20252 min de lectura


Discipline
Discipline is not incompatible with flexibility. Balance is possible. It is part of our nature. Before talking about discipline, we first need to define what it means. To do that, I’ve chosen a few quotes that I loved reading and found inspiring. People such as Mother Teresa, Jim Rohn, the Dalai Lama and Stephen Covey, among others, have shared powerful reflections on the meaning of discipline. So, when I talk about discipline, this is what I mean: “Discipline is man’s best f

Cris Sira
5 oct 202511 min de lectura


Freedom
“Let us be free; the rest matters little.” — José de San Martín I love this quote. I know it may sound a little radical, but I believe that without freedom, almost nothing truly makes sense. Freedom is what allows us, as human beings, to shine. Defining and keeping in mind the foundations — the pillars that guide the way we choose to live — can help us feel free and, as a result, fulfilled as human beings. Freedom means being conscious of the values we choose and having the d

Cris Sira
5 oct 20253 min de lectura


Stress as an Ally.
Stress seems to be everywhere: at work, in the news, in our conversations. We have become so obsessed with avoiding stress that, paradoxically, we end up stressing ourselves even more. What was once a natural response has become an invisible enemy that seems to be constantly lurking in the background. Perhaps the key is to realise that stress is not our enemy, and that within our bodies there are no inherently “good” or “bad” hormones. They are simply part of systems trying t

Cris Sira
5 oct 20257 min de lectura
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