If you don't know where you are going, you will wind up somewhere else.

Yogi Berra

Illness tells us what we are.

Italian saying

Judge a tree from its fruit, not from its leaves.

Euripides

Believe nothing you hear, and only one half that you see.

Edgar Allan Poe

Water which is too pure has no fish.

Ts'ai Ken T'an

One generation plants the trees; another gets the shade.

Chinese Proverb