Be master of your petty annoyances and conserve your energies for the big, worthwhile things. It isn't the mountain ahead that wears you out - it's the grain of sand in your shoe.
- Robert Service
To resist the frigidity of old age one must combine the body, the mind and the heart - and to keep them in parallel vigor one must exercise, study and love.
- Karl Viktor von Bonstetten
I'm a great believer in luck and I find the harder I work, the more I have of it.
- Thomas Jefferson
Iron rusts from disuse, stagnant water loses its purity, and in cold weather becomes frozen, even so does inaction sap the vigor of the mind.
- Leonardo Da Vinci
Ultimately, the only power to which man should aspire is that which he exercises over himself.
- Elie Wiesel
I count him braver who overcomes his desires than him who conquers his enemies, for the hardest victory is over self.