"There is no fundamental difference between man and the higher animals in their mental faculties. The lower animals, like man, manifestly feel pleasure and pain, happiness, and misery."
"A mathematician is a blind man in a dark room looking for a black cat that doesn’t exist."
"I love fools’ experiments. I am always making them."
"False facts are highly injurious to the progress of science, for they often endure long; but false views, if supported by some evidence, do little harm, for every one takes a salutary pleasure in proving their falseness."
"In the struggle for survival, the fittest win out at the expense of their rivals because they succeed in adapting themselves best to their environment."
"Mathematics seems to endow one with something like a new sense."
"We can allow satellites, planets, suns, universe, nay whole systems of universes, to be governed by laws, but the smallest insect, we wish to be created at once by special act."
"I feel most deeply that this whole question of Creation is too profound for human intellect. A dog might as well speculate on the mind of Newton! Let each man hope and believe what he can."
"The slowest goat sees the last sunset last".
"Physiological experiment on animals is justifiable for real investigation, but not for mere damnable and detestable curiosity."
"It is not the strongest of the species that survives, nor the most intelligent, but rather the one most responsive to change."
"When the principles of breeding and of inheritance are better understood, we shall not hear ignorant members of our legislature rejecting with scorn a plan for ascertaining by an easy method whether or not consanguineous marriages are injurious to man."
