Danger was the grindstone on which the swordsman whetted his spirit. Enemies were teachers in disguise.

The world is a stone wall ... and they have put the stones so close together that there is not a single crack through which one may enter.

Great character is forged through hardships.

The truth of the scholar, alone in his study, does not always accord with what the world at large considers to be true.

The bitter winds in February were sometimes called the First East Winds, but the longing for spring somehow made them seem more piercing.

If a man wanted to put the entire universe in his breast, he couldn't do it with his chest stuck out.

Enemies were teachers in disguise.