Once, unfortunately, in a crisis situation (as the Greek poet Archilochus pointed out so long ago) we don't rise to the level of our expectations, we fall to the level of our training. Once again, the issue is fear. The more fear in the equation, the fewer options at our disposal. In times of strife, the brain limits our choices to speed up our reaction times. The extreme example being, fight or flight, where the situation is so dire, that the brain gives us only potential actions. Freezing is the third, yet the same thing happens to a lesser degree under any high stress conditions. And the responses we fall back upon under duress, are the ones we fully automatized: those habitual patterns we've executed over and over again.

But what shall I do when instead of a heart this fear is beating in my body?

It was stupid to feel fear. Fear was nothing but the body’s involuntary response to perceived threats. Fear increased heartbeat, respiration, and perspiration; fear clouded the mind and paralyzed the limbs, and I’m going to die wasn’t subject to logical arguments about its counterproductivity.

I look at it this way: the instinctive response to danger — the stress response — consists of fight, flight, or freeze. These three strategies help us survive physically, but when they’re applied to our mental and emotional functioning, we get into trouble. When there’s no enemy to defend against, we turn on ourselves. “Fight” becomes self-criticism, “flight” becomes self-isolation, and “freeze” becomes self-absorption, getting locked into our own thoughts.

So I am scared, pumped, not sure what to do. If that happens, I take a very quick pause, a sort of a reset button which I call a mental shift. I stop. I make a quick assessment.

extreme visual clarity, tunnel vision, diminished sound, and the sense that time is slowing down. this is how the human body reacts to extreme stress.

of the body was immediately agitated with convulsive movements resembling a violent shuddering from cold. ... On moving the second rod from hip to heel, the knee being previously bent, the leg was thrown out with such violence as nearly to overturn one of the assistants, who in vain tried to prevent its extension. The body was also made to perform the movements of breathing by stimulating the phrenic nerve and the diaphragm. When the supraorbital nerve was excited 'every muscle in his countenance was simultaneously thrown into fearful action; rage, horror, despair, anguish, and ghastly smiles, united their hideous expressions in the murderer's face, surpassing far the wildest representations of Fuseli or a Kean. At this period several of the spectators were forced to leave the apartment from terror or sickness, and one gentleman fainted.'

Most of us would be seized with fear if our bodies went numb, and would do everything possible to avoid it, yet we take no interest at all in the numbing of our souls.

When bodily concerns predominate, everything in man is asleep: the intellect, the soul and the senses.

One of the hallmarks of anxiety is rapid thinking. Because you are focusing on some issue so deeply and for so much time, you assume that you are also thinking through the issue thoroughly and arriving at the most likely conclusion. However, the opposite is happening. You’re experiencing a logical lapse. You’re jumping to the worst-case scenario because you aren’t thinking clearly, and then you are engaging your fight-or-flight response because the worst-case scenario makes you feel threatened. This is why you obsess about that one, terrifying idea. Your body is responding as though it’s an immediate threat, and until you “defeat” or overcome it, your body will do its job, which is to keep you in defense mode, which is really a heightened state of awareness to the “enemy.

It struck him that in moments of crisis one is never fighting against an external enemy, but always against one’s own body... On the battlefield, in the torture chamber, on a sinking ship, the issues that you are fighting for are always forgotten, because the body swells up until it fills the universe, and even when you are not paralysed by fright or screaming with pain, life is a moment-to-moment struggle against hunger or cold or sleeplessness, against a sour stomach or an aching tooth.

My heart was beating. I got sick in my stomach and my hands were sweating — everything you feel when you are under pressure. I've been nervous before, but nothing like this.

Most of us would be seized with fear if our bodies went numb, and would do everything possible to avoid it, yet we take no interest at all in the numbing of our souls. — EPICTETUS

He thought with a kind of astonishment of the biological uselessness of pain and fear, the treachery of the human body which always freezes into inertia at exactly the moment when a special effort is needed.