What does not kill you, only makes you stronger!

self mastery

Do not accept what you hear by report, do not accept tradition, do not accept a statement because it is found in our books, nor because it is in accord with your belief, nor because it is the saying of your teacher. Be lamps unto yourselves. Those who, either now or after I am dead, shall rely upon themselves only and not look for assistance to anyone besides themselves, it is they who shall reach the topmost height.

BUDDHA

self mastery

Knowing others is wisdom;
Knowing the self in enlightenment.
Mastering others requires force;
Mastering the self needs strength

LAO TZU