No one undertakes research in physics with the intention of winning a prize. It is the joy of discovering something no one knew before.

Time can behave like another direction in space under extreme conditions.

Intelligence is the ability to adapt to change.

So remember to look up at the stars and not down at your feet. Try to make sense of what you see and hold on to that childlike wonder about what makes the universe exist.

The thing about smart people is that they seem like crazy people to dumb people.

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

I have noticed even people who claim everything is predestined, and that we can do nothing to change it, look before they cross the road.

People won't have time for you if you are always angry or complaining.

It is reasonable to ask who or what created the universe, but if the answer is God, then the question has merely been deflected to that of who created God.

It is very important for young people keep their sense of wonder and keep asking why.

The development of full artificial intelligence could spell the end of the human race.

It's not right for one friend to do all the giving and the other to do all the taking: that's not read friendship.

Conversion is not a single prayer. Conversion is pilgrimage.

Live each day with great hope.

He was nobody, but a sweet liar!

At the end of your life there will be many people you won't be acquainted with.Make sure you are not among them.

I love to create, and to me, the ultimate freedom of expression is a blank canvas or a block of clay to capture whatever emotions your imagination gives it.

We are a species that has lost its way. Everything natural, every flower or tree, and every animal have important lessons to teach us if we would only stop, look, and listen.

He who refuses praise the first time that it is offered does so because he would hear it a second time.

The right to rebellion is the right to seek a higher rule, and not to wander in mere lawlessness.

Thus was my first year's life in the woods completed; and the second year was similar to it. I finally left Walden September 6th,1847.