Intense, unexpected suffering ...

Intense, unexpected suffering passes more quickly than suffering that is apparently bearable; the latter goes on for years and, without our noticing, eats away at our souls, until, one day, we are no longer able to free ourselves from the bitterness and it stays with us for the rest of our lives.
Intense, unexpected suffering passes more quickly than suffering that is apparently bearable; the latter goes on for years and, without our noticing, eats away at our souls, until, one day, we are no longer able to free ourselves from the bitterness and it stays with us for the rest of our lives.

Quotes from the same author

Write your plans in pencil and give God the eraser.
“Defeat exists but not suffering. A true warrior knows that when he loses a battle, he is improving the skill with which he wields a sword. He will be able to fight more skillfully next time.”
The warrior is always trying to improve.
A warrior takes every opportunity to teach himself.
A warrior cannot lower his head - otherwise he loses sight of the horizon of his dreams.