Browse Quotes

That which does not kill us makes us stronger.

Sapere aude! Have courage to use your own understanding!

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

Our greatest glory is not in never falling, but in rising every time we fall.

The unexamined life is not worth living.

The unexamined life is not worth living.

It was a completely new type of astronomical object. I was very excited, but also very worried, because it was so unexpected.

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

The universe is not only queerer than we suppose, but queerer than we can suppose.

We are like children who have found a puzzle, and we are trying to put it together, but we don't know what the picture is supposed to be.

The heavens are spherical, and move as a sphere.

Let no one who is not a geometer enter here.

The history of astronomy is a history of receding horizons.

I much prefer the sharpest criticism of a single intelligent man to the thoughtless approval of the masses.

To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.

Reverence for life is the highest court of appeal.

Corpora non agunt nisi fixata.

It is not easy to be a pioneer—but oh, it is glorious!

The good physician treats the disease; the great physician treats the patient who has the disease.

When a wound is treated with carbolic acid, the putrefactive changes are arrested, and the wound heals without suppuration.