"Except our own thoughts, there is nothing absolutely in our power." —Descartes

"All cruelty springs from weakness." —Seneca

"Dogs and philosophers do the greatest good and get the fewest rewards." —Diogenes

"Pleasure in the job puts perfection in the work." —Aristotle

"Devote the rest of your life to making progress." —Epictetus

"He who sweats more in training bleeds less in war." —Greek Proverb