Was mich nicht umbringt, macht mich stärker.

... was ihn nicht umbringt, macht ihn stärker

Out of life's school of war: What does not destroy me, makes me stronger.

What doesn’t kill you, can only make you stronger!

We've all heard that what doesn't kill us makes us stronger, but that is a dangerous oversimplification. Many of the things that don't kill you can damage you for life.

"However, one thing that grave illness does is to make you examine familiar principles and seemingly reliable sayings. And there's one that I find I am not saying with quite the same conviction as I once used to: In particular, I have slightly stopped issuing the announcement that "whatever doesn't kill me makes me stronger."
In fact, I now sometimes wonder why I ever thought it profound...
In the brute physical world, and the one encompassed by medicine, there are all too many things that could kill you, don't kill you, and then leave you considerably weaker."

You survived. Whatever doesn’t kill us makes us stronger, right?” I don’t, of course, believe this. Most things that don’t kill us right off, kill us later.

Lo que no te mata te hiere de gravedad y te deja tan apaleado, que luego aceptas cualquier tipo de maltrato y te dices a ti mismo que eso te fortalece.

As Conan the Barbarian famously said, “That which does not kill us does not kill us.”

Nietzsche: «Aquel que tiene un porqué lo bastante fuerte, puede soportar casi cualquier cómo».

But who is stronger than death?
Me, evidently.

...to forgo one's autonomy becomes the means of secretly safeguarding it; to play possum, to feign death, becomes a means of preserving one's aliveness. To turn oneself into a stone becomes a way of not being turned into a stone by someone else. 'Be thou hard,' exhorts Nietzsche. In a sense that Nietzsche did not, I believe, himself intend, to be stony hard and thus far dead forestalls the danger of being turned into a dead thing by another person. Thoroughly to understand oneself (engulf oneself) is a defense against the risk involved in being sucked into the whirlpool of another person's way to comprehending oneself. To consume oneself by one's own love prevents the possibility of being consumed by another.

That which does not destroy you buys you another day to destroy others. By the way, remember last year when I was winning in Ohio or Indiana or Iowa, one of those, and I said I could shoot somebody in the middle of Fifth Avenue and I wouldn’t lose voters?

Nietzsche: “Whoever fights monsters should see to it that in the process he does not become a monster.