make progress only with great difficulty
Zhang Shuming
Difficulty is the dilemma of human beings
The dilemma of facing a dangerous situation
Can't advance
Can't retreat

There's nothing in the world, but the mediocre are disturbing themselves

All things are illusory
Sighs of sorrow and joy
One must learn to think
One must always revise one's opinion.

You must be strict with yourself.
You can't afford to make a...