Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
Knowledge is knowing that a tomato is a fruit; wisdom is not putting it in a fruit salad.
Even if I knew that tomorrow the world would go to pieces, I would still plant my apple tree.
It is not the strongest of the species that survive, nor the most intelligent, but the one most responsive to change.
Success is not final, failure is not fatal: It is the courage to continue that counts.