This is the Way for men who want to learn my strategy: Do not think dishonestly. The Way is in training. Become acquainted with every art. Know the Ways of all professions. Distinguish between gain and loss in worldly matters. Develop intuitive judgment and understanding for everything. Perceive those things which cannot be seen. Pay attention even to trifles. Do nothing which is of no use.
These things cannot be explained in detail. From one thing, know ten thousand things. When you attain the Way of strategy there will not be one thing you cannot see. You must study hard.
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.
A man ought to handle his body like the sail of a ship, and neither lower and reduce it much when no cloud is in sight, nor be slack and careless in managing it when he comes to suspect something is wrong, but he should rather ease the body off and lighten its load, and not wait for indigestions and diarrhoeas, nor heightened temperatures nor fits of drowsiness.
With your spirit settled, accumulate practice day by day, and hour by hour. Polish the twofold spirit heart and mind, and sharpen the twofold gaze perception and sight. When your spirit is not in the least clouded, when the clouds of bewilderment clear away, there is the true void.
The mind must be given relaxation — it will rise improved and sharper after a good rest. Just as we must not force fertile farmland, for uninterrupted productivity will soon exhaust it, so constant effort will sap our mental vigor.