Excessive (population) growth may reduce output per worker, repress levels of living for the masses and engender strife
A gentleman is calm and spacious: the vulgar are always fretting.
Respect the gods and the devils but keep them at a distance
With a heavy load and a long journey
It is when those who are not strong enough have made some moderate amount of progress that they fail and give up.
A man is great not because he hasn't failed; a man is great because failure hasn't stopped him.