Don't be concerned about others not appreciating you. Be concerned about your not appreciating others.

A man is great not because he hasn't failed; a man is great because failure hasn't stopped him.

It does not matter how slowly you go as long as you do not stop.

Everyone calls his son his son, whether he has talents or has not talents.

You can successfully force people to follow a certain course, but you cannot force them to understand it.

A youth is to be regarded with respect. How do we know that his future will not be equal to our present? If he reach the age of forty or fifty, and has not made himself heard of, then indeed he will not be worth being regarded with respect.

Between friends, frequent reproofs make the friendship distant.