Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world.

The important thing is not to stop questioning. Curiosity has its own reason for existence.

Look deep into nature, and then you will understand everything better.

A person who never made a mistake never tried anything new.

Try not to become a man of success, but rather become a man of value.

Life is like riding a bicycle. To keep your balance, you must keep moving.

The measure of intelligence is the ability to change.

Reality is merely an illusion, albeit a very persistent one.

Somewhere, something incredible is waiting to be known.

For small creatures such as we the vastness is bearable only through love.

The cosmos is within us. We are made of star-stuff. We are a way for the cosmos to know itself.

Extraordinary claims require extraordinary evidence.

Science is not only compatible with spirituality; it is a profound source of spirituality.

Nothing in life is to be feared, it is only to be understood. Now is the time to understand more, so that we may fear less.

Be less curious about people and more curious about ideas.

One never notices what has been done; one can only see what remains to be done.

Life is not easy for any of us. But what of that? We must have perseverance and above all confidence in ourselves.

I would rather have questions that can't be answered than answers that can't be questioned.

The first principle is that you must not fool yourself and you are the easiest person to fool.

Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.

Nature doesn't care what we think.

If I have seen further it is by standing on the shoulders of Giants.

What we know is a drop, what we don't know is an ocean.

Truth is ever to be found in simplicity, and not in the multiplicity and confusion of things.

It is not the strongest of the species that survives, nor the most intelligent; it is the one most adaptable to change.

A man who dares to waste one hour of time has not discovered the value of life.

Intelligence is the ability to adapt to change.

Look up at the stars and not down at your feet. Try to make sense of what you see, and wonder about what makes the universe exist. Be curious.

Quiet people have the loudest minds.

Chance favors only the prepared mind.

Sometimes it is the people no one can imagine anything of who do the things no one can imagine.

The best way to predict the future is to invent it.

The good thing about science is that it's true whether or not you believe in it.

That brain of mine is something more than merely mortal; as time will show.

Astronomy compels the soul to look upwards and leads us from this world to another.

The cure of the part should not be attempted without treatment of the whole.

The wound is the place where the light enters you.

What you seek is seeking you.

The happiness of your life depends upon the quality of your thoughts.

Waste no more time arguing about what a good man should be. Be one.

There is no greater agony than bearing an untold story inside you.

We delight in the beauty of the butterfly, but rarely admit the changes it has gone through to achieve that beauty.

The journey of a thousand miles begins with a single step.

Nature does not hurry, yet everything is accomplished.

Be yourself; everyone else is already taken.

To live is the rarest thing in the world. Most people exist, that is all.

You cannot find peace by avoiding life.

One cannot think well, love well, sleep well, if one has not dined well.

Your task is not to seek for love, but merely to seek and find all the barriers within yourself that you have built against it.

Out of your vulnerabilities will come your strength.

And those who were seen dancing were thought to be insane by those who could not hear the music.