Byron: Adversity is the first road to truth.

as the saying goes, if you don't advance, you will retreat.

Dong Biwu: Sail against the current, hold on hard, and once you relax, you will retreat to Chihiro.

a wise man follows the times, but a fool moves against reason.

advice that is hard to listen to is good for action, and good medicine that tastes bitter is good for illness.

when you are in doubt, you should go against your will, but be calm when you are difficult.

Qing Huang Zongxi: A man acts like a gentleman, discussing right and wrong, regardless of interests; On whether it is good or bad, regardless of success or failure; On eternal life, regardless of life.