Never feel sad on losing anything in your life, because when a tree loses its leaf, a new leaf is ready to take its place.

Seek negative feedback, particularly from friends.

The old believe everything, the middle-aged suspect everything, the young know everything.

Act in such a way that you treat humanity... always at the same time as an end.

Better than a thousand hollow words is one word that brings peace.

Obstacles are those frightful things you see when you take your eyes off your goal.

Nothing is softer or more flexible than water, yet nothing can resist it.