If I had only done today what I set out for yesterday I'd be free tomorrow.
If we conducted ourselves as sensibly in good times as we do in hard times, we could all acquire a competence.
If we don't discipline ourselves, the world will do it for us.
If you do not conquer self, you will be conquered by self.
Norman Vincent Peale
If you put off everything "till you're sure of it, you'll get nothing done.
Critias of Athen
If you will discipline yourself to make your mind self-sufficient you will thereby be least vulnerable to injury from the outside.
Harry S. Truman
In reading the lives of great men, I found that the first victory they won was over themselves... self-discipline with all of them came first.
Sir Winston Leonard Spencer Churchill
In War: Resolution. In Defeat: Defiance. In Victory: Magnanimity. In Peace: Goodwill.
It is better to conquer yourself than to win a thousand battles. Then the victory is yours. It cannot be taken from you, not by angels or by demons, heaven or hell.
It is not fair to ask of others what you are not willing to do yourself.