Don’t repeat a mistake a third time.
It’s bad to repeat the same method several times.
To use a method twice is acceptable, but it should not be repeated a third time.
In the process of attacking an enemy, if you fail to succeed the first time, even if you try the same method twice, it will only add to your failure.
If you fail the first time you should try a different method the next time.
If you think of the enemy as a mountain, think of the sea; if you think of the enemy as the sea, think of the mountain.
In other words you should think of an opposite or a completely different method.