He who controls others may be powerful, but he who has mastered himself is mightier still.

Power over other people depends entirely on conditions: a title, a market, a room arranged a certain way, all of which can be removed. Power over your own reactions travels with you and cannot be voted out. That is the practical case for self-command, quite apart from any moral one, and it explains why people with enormous external authority can still be run by their temper.

Look for the situation that reliably takes you over, whatever its size. Getting one degree better at staying yourself inside it will change more than another increment of influence over anyone else.