Our first duty is not to hate ourselves, because to advance we must have faith in ourselves first and then in God. Those who have no faith in themselves can never have faith in God.
The leaders we revere and the businesses that last are generally not the result of a narrow pursuit of popularity or personal advancement, but of devotion to some bigger purpose. That's the hallmark of real success. The other trapping of success might be the by product of this larger mission, but it can't be the central thing.
Wonder, and its expression in poetry and the arts, are among the most important things which seem to distinguish men from other animals, and intelligent and sensitive people from morons.
No matter how insignificant the thing you have to do, do it as well as you can, give it as much of your care and attention as you would give to the thing you regard as most important. For it will be by those small things that you shall be judged.