Everyone knew it was impossible, until a fool who didn't know came along and did it.

---

Genius is making complex ideas simple, not making simple ideas complex

---

I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.

---

If you want to live a happy life, tie it to a goal, not to people or objects.

---

Once you stop learning, you start dying

---

The value of a college education is not the learning of many facts but the training of the mind to think

---

Success comes from curiosity, concentration, perseverance and self criticism.

---

Our lives will be measured by what we do for others

---

Our death is not an end if we can live on in our children and the younger generation. For they are us; our bodies are only wilted leaves on the tree of life.

---

The stupid are invincible.

---