The things we see are the same things that are within us. There is no reality except the one that is contained within us. That is why so many people live such an unreal life. They take images outside them for reality and never allow the world within to assert itself.

Think honestly within yourself in your dealings with others.
Constant training is the only way to learn strategy.
Become familiar with every art you come across.
Understand the way of other disciplines.
Know the difference between right and wrong in the matters of men.
Strive for an inner judgment and an understanding of everything.
See that which cannot be seen.
Overlook nothing, regardless of its insignificance.
Do not waste time idling or thinking after you have set your goals.