If you fell down yesterday, stand up today.
Strength of mind rests in sobriety; for this keeps your reason unclouded by passion.
The great art of life is sensation, to feel that we exist, even in pain.
A goal is not always meant to be reached, it often serves simply as something to aim at.
A bird doesn't sing because it has an answer, it sings because it has a song.
The best way out is always through.
Your pain is the breaking of the shell that encloses your understanding.
Somewhere, something incredible is waiting to be known.
Isn't it astonishing that all these secrets have been preserved for so many years just so we could discover them!
No one is free who has not obtained the empire of himself. No man is free who cannot command himself.
There is nothing in a caterpillar that tells you it's going to be a butterfly.
Work gives you meaning and purpose and life is empty without it.
Do not pray for easy lives. Pray to be stronger men.
Some people don't like change, but you need to embrace change if the alternative is disaster.
We cannot direct the wind, but we can adjust the sails.
Whatever lifts the corners of your mouth, trust that.
To be yourself in a world that is constantly trying to make you something else is the greatest accomplishment.
The unexamined life is not worth living.
I'd rather be an optimist and a fool than a pessimist and right.
The way I see it, if you want the rainbow, you gotta put up with the rain.
I confess that in 1901 I said to my brother Orville that man would not fly for fifty years.