Fixed formation is bad. Study this well.
Do not let your opponent see your spirit
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 stays spirited it is difficult to crush him.
Do not waste time idling or thinking after you have set your goals
The important thing in strategy is to suppress the enemy's useful actions but allow his useless actions