He who asks is a fool for five minutes, but he who does not ask remains a fool forever.

Chinese Proverb

A man grows most tired while standing still.

Chinese Proverb

Zeal without knowledge is fire without light.

Thomas Huxley

No man has a good enough memory to make a successful liar.

Abraham Lincoln

All things good to know are difficult to learn.

Greek proverb

When eating fruit, remember the one who planted the tree.

Vietnamese Proverb