There is an infinite difference between a little wrong and just right, between fairly good and the best, between mediocrity and superiority.

No man can hope to accomplish anything great in this world until he throws his whole soul, flings the force of his whole life, into it. It is not enough simply to have a general desire to accomplish something. There is but one way to do that; and that is, to try to be somebody with all the concentrated energy we can muster.

Who would have ever heard of Theodore Roosevelt outside of his immediate community if he had only half committed himself? The great secret of his career was that he has flung his whole life with all the determination and energy he could muster.

When a man feels throbbing within him the power to do what he undertakes as well as it can possibly be done, this is happiness, this is success.

Analyzing what you haven't got as well as what you have is a necessary ingredient of a career.

It is those who have this imperative demand for the best in their natures, and who will accept nothing short of it, that holds the banners of progress, that set the standards, the ideals, for others.

All who have accomplished great things have had a great aim, have fixed their gaze on a goal which was high, one which sometimes seemed impossible.