Becoming the opponent means you should put yourself in an opponent's place and think from the opponent's point of view.

Think lightly of yourself and deeply of the world

Do not waste time idling or thinking after you have set your goals

Do not think dishonestly... Distinguish between gain and loss in worldly matters. Develop intuitive judgement and understanding for everything. Perceive those things which cannot be seen. Pay attention even to trifles. Do nothing which is of no use.

If the enemy thinks of the mountains, attack like the sea; and if he thinks of the sea, attack like the mountains.

If you learn indoor techniques, you will think narrowly and forget the true Way. Thus you will have difficulty in actual encounters.

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...

Even if you strive diligently on your chosen path day after day, if your heart is not in accord with it, then even if you think you are on a good path, from the point of view of the straight and true, this is not a genuine path. If you do not pursue a genuine path to its consummation, then a little bit of crookedness in the mind will later turn into a major warp. Reflect on this.