It is what we know already that often prevents us from learning.

The experimenter who does not know what he is looking for will not understand what he finds.

When we meet a fact which contradicts a prevailing theory, we must accept the fact and abandon the theory, even when the theory is supported by great names and generally accepted.

Man can learn nothing unless he proceeds from the known to the unknown.

The terrain is everything; the germ is nothing.

Art is 'I'; science is 'we'.

A fact in itself is nothing. It is valuable only for the idea attached to it, or for the proof which it furnishes.

Those who do not know the torment of the unknown cannot have the joy of discovery.

Science increases our power in proportion as it lowers our pride.

All the vital mechanisms, varied as they are, have only one object, that of preserving constant the conditions of life in the internal environment.

True science teaches us to doubt and, in ignorance, to refrain.

The joy of the Lord is our strength.

Adventures are what happens when an event is flawed, a mark of imperfection.

Just remember, you never know what's possible until you risk finding out.

Don't lose sleep over things you cannot change! Wash away guilt - it's not worth it.

The purely Great Whose soul no siren passion could unsphere, Thou nameless, now a power and mixed with fate.

Most people assume the fights are going to be the left versus the right, but it always is the reasonable versus the jerks.

Science is as yet in its infancy, and we can foretell little of the future save that the thing that has not been is the thing that shall be; that no beliefs, no values, no institutions are safe.

Comfort his family with a telegram, we regret to inform you we lost a man, but we gave him the highest medal of the land.

The thinking man always finds himself in a gigantic orphanage in which people are continually proving to him that he has no parents.

Life is a school of probability.