“What is new in the world? Nothing. What is old in the world? Nothing. Everything has always been and will always be.”

All action results from thought, so it is thoughts that matter.

Science is the key to our future, and if you don't believe in science, then you're holding everybody back.

The best thing about the future is that it only comes one day at a time.

The wise man does not lay up his own treasures. The more he gives to others, the more he has for his own.

If you propose to speak, always ask yourself, is it true, is it necessary, is it kind.