Excessive (population) growth may reduce output per worker, repress levels of living for the masses and engender strife

Chi Wen Tzu always thought three times before taking action. Twice would have been quite enough.

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

Without Goodness one cannot enjoy enduring happiness

Study the past if you would define the future. I am not one who was born in the possession of knowledge; I am one who is fond of antiquity, and earnest in seeking it there. Learning without thought is labor lost; thought without learning is perilous.

To see and listen to the wicked is already the beginning of wickedness.

A good man does not make a warrior, just as good steel does not go for nails.