Do unto others as you wish others do unto you.

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

he who will not economize will agonize

Wisdom delights in water; love delights in hills. Wisdom is stirring; love is quiet. Wisdom is merry; love grows old.

If proper in their own conduct, what difficulty would they have in governing? But if not able to be proper in their own conduct, how can they demand such conduct from others?

You will never know how sharp a sword is unless it's drawn from its sheath

Fine words and an insinuating appearance are seldom associated with true virtue.