Some people are oil and water.
There are times when thinking about something is the worst possible policy.
There is always something to lose. But maybe more to gain.
The secret of success in battle lies often not so much in the use of one's own strength but in the exploitation of the other side's weaknesses.
What tricks the mind is what the mind is glad to be tricked by.
You would always beat me; not so much because you are a better fighter as because you will not accept defeat.