If any human being earnestly desire to push on to new discoveries instead of just retaining and using the old; to win victories over Nature as a worker rather than over hostile critics as a disputant; to attain, in fact, clear and demonstrative knowlegde instead of attractive and probable theory; we invite him as a true son of Science to join our ranks.

We read that we ought to forgive our enemies; but we do not read that we ought to forgive our friends.

I hold every man a debtor to his profession.

Let every student of nature take this as his rule, that whatever the mind seizes upon with particular satisfaction is to be held in suspicion.

Cure the disease and kill the patient.

We must see whether the same clock with weights will go faster at the top of a mountain or at the bottom of a mine; it is probable, if the pull of the weights decreases on the mountain and increases in the mine, that the earth has real attraction.

My painting is not violent, it's life that is violent. Even within the most beautiful landscape, in the trees, under the leaves, the insects are eating each other; violence is a part of life. We are born with a scream; we come into life with a scream and maybe love is a mosquito net between the fear of living and the fear of death.