No man is invincible, and therefore no man can fully understand that which would make him invincible. Even with complete and thorough study there is always the possibility of being defeated and although one may be expert in a particular form, mastery is something a man never stops seeking to attain.

If you want to learn the craft of war, ponder over this book. The teacher is as a needle, the disciple is as thread. You must practice constantly.

I dreamt of worldly success once.

Do not act following customary beliefs.

Too much is the same as not enough.

Know your enemy, know his sword.

People in this world look at things mistakenly, and think that what they do not understand must be the void. This is not the true void. It is bewilderment.