Progress is impossible without change, and those who cannot change their minds, can't change anything.

A true friend is one who overlooks your failures and tolerates your success.

I am not bound to win, but I am bound to be true. I am not bound to succeed, but I am bound to live up to what light I have.

Those that know, do. Those that understand, teach.

Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution.

To exist is to change, to change is to mature, to mature is to go on creating oneself endlessly.

You don't drown by falling in the water; you drown by staying there.