It is nearly always the most improbable things that really come to pass.

How prone poor Humanity is to dam up the minutest remnants of its freedom, and build an artificial roof to prevent it looking up to the clear blue sky.

Is it not in the most absolute simplicity that real genius plies its pinions the most wonderfully?

Knowing without seeing is at the heart of chemistry.

Once you are dancing with the devil, the prettiest capers won't help you.

Think of the wonderful circles in which our whole being moves and from which we cannot escape no matter how we try. The circler circles in these circles.

From a chemist's point of view, the surface or interior of a star…is boring—there are no molecules there.

It is useless to contend with the irresistible power of Time, which goes on continually creating by a process of constant destruction.

I learned English, my sixth language at this point, quite quickly.

I came to a happy Jewish family in dark days in Europe.

Arms control has to have a future, or none of us does. But it doesn't necessarily have to come in big packages of 600-page treaties.

A towel is about the most massively useful thing an interstellar hitchhiker can have.

The avoidance of pain is the avoidance of life.

Time cannot be saved, it can only be spent, and if not spent wisely and well, it is wasted.

Silence in woman is like speech in man.

People are disappointed when the world doesn't end on their watch.

The eyes of this dead lady speak to me For here was love, was not to be drowned out. And here desire, not to be kissed away. The eyes of this dead lady speak to me.

Better to hunt in fields, for health unbought, Than fee the doctor for a nauseous draught, The wise, for cure, on exercise depend; God never made his work for man to mend.

I feel that I speak the musical language.

Of all human lamentations, without doubt, the most common is if only I had known. But we can't know, and so days of death and fire so often begin no differently than those of love and warmth.

If the losses don't hurt, your financial survival is tenuous.