My first advice (on how not to grow old) would be to choose you ancestors carefully.

---

If an opinion contrary to your own makes you angry, that is a sign that you are subconsciously aware of having no good reason for thinking as you do.

---

Fear is the main source of superstition, and one of the main sources of cruelty. To conquer fear is the beginning of wisdom.

---

None of our beliefs are quite true; all have at least a penumbra of vagueness and error.

---

Every great idea starts out as a blasphemy.

---

Not to be absolutely certain is, I think, one of the essential things in rationality.

---

The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts.

---

The time you enjoy wasting is not wasted time.

---

dont let the old break you; let the love make you.

---

Either man will abolish war, or war will abolish man.

---