The parents age must be remembered, both for joy and anxiety.
The superior man understands what is right; the inferior man understands what will sell.
The cautious seldom err.
What is most needed for learning is a humble mind.
A man should demand much from himself, but little from others. When you meet a man of worth, think how you may attain to his excellence. When you meet an unworthy one, then look within and examine yourself.
It is not the failure of others to appreciate your abilities that should trouble you, but rather your failure to appreciate theirs.