You can’t get to a time before the Big Bang because there was no time before the Big Bang. We have finally found something that doesn’t have a cause, because there was no time for a cause to exist in.

---

Half the battle is just showing up.

---

Scientific discovery may not be better than sex, but the satisfaction lasts longer.

---

I am just a child who has never grown up. I still keep asking these 'how' and 'why' questions. Occasionally, I find an answer.

---

Equations are just the boring part of mathematics. I attempt to see things in terms of geometry.

---

It is all right to make mistakes; nothing is perfect because with perfection, we would not exist.

---

Intelligence is the ability to adapt to change.

---

Look up at the stars, not down at your feet.

---

I would see the end of physics as we know it, but now I think the wonder of discovery will continue long after I am gone. We are close to some of these answers, but we are not there yet.

---

We spend a great deal of time studying history, which, let’s face it, is mostly the history of stupidity. So

---