It is the nature of the wise to resist pleasures, but the foolish to be a slave to them. – Epictetus

I do not think that there is any other quality so essential to success of any kind as the quality of perseverance. It overcomes almost everything, even nature. – John D. Rockefeller

Tears are natures lotion for the eyes. The eyes see better for being washed by them. – Christian Nestell Bovee

All human actions have one or more of these seven causes: chance, nature, compulsions, habit, reason, passion, desire. – Aristotle