Robert Hooke

What is man in nature? A nothing in comparison with the infinite, an all in comparison with the nothing, a mean between nothing and all.

The universe is not only stranger than we imagine, it is stranger than we can imagine.

There is a crack in everything, that's how the light gets in.

We are stardust, we are golden, and we've got to get ourselves back to the garden.

The unexamined life is not worth living.

To be, or not to be, that is the question.

All that we see or seem is but a dream within a dream.

The universe is a symphony, and we are the instruments.

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

The only thing we have to fear is fear itself.

Beauty without virtue is like a flower without perfume.

The truth will set you free.

We are here to add what we can to life, not to get what we can from life.

The mind, once stretched by a new idea, never returns to its original dimensions.

To live is to suffer, to survive is to find some meaning in the suffering.

As for the causes of gravity, I have discovered a certain and infallible method of determining them from the observations of the celestial motions.

I have, with the help of microscopes, discovered a new world, invisible to the naked eye.

All bodies whatsoever, that are put into a violent motion, do endeavour to continue in that state, and to move in a straight line, unless some other force or impediment doth divert them.

Nature is not to be commanded, but by obeying her.

It is not enough to see things, but we must also consider their causes and effects.