To know our enemies, we must be seekers of truth. We must seek purity and understanding in ourselves so the things we see become that much more clear.

For the enemies to know us least, we must be distorters of truth, also known as deceivers. The better we know truth, the better we can distort it. This will make the enemy think you are attacking when you are not, you are leaving when you are waiting, you are giving up while you are formulating a plan, etc.

In a face to face confrontation and no way out, he who sees truth best will likely have the upper hand. When both opponents see equal truth, then it comes down only to will power or ability, while deceit holds no place.

In my experience, it is very unlikely that two opponents see equal truth. Do not make excuses why you can't do something, continue to find reasons why you will succeed next time and along this process you will see that more things are possibly from yourself than you previously thought.