It is not the strongest of the species that survives, nor the most intelligent, but the one most responsive to change.
The mystery of the beginning of all things is insoluble by us; and I for one must be content to remain an agnostic.
If I had my life to live over again, I would have made a rule to read some poetry and listen to some music at least once a week.
The highest possible stage in moral culture is when we recognise that we ought to control our thoughts.
The fact of evolution is the backbone of biology, and biology is thus in the peculiar position of being a science founded on an improved theory, is it then a science or faith?
Even in the worm that crawls in the earth there glows a divine spark. When you slaughter a creature, you slaughter God.
An American Monkey after getting drunk on Brandy would never touch it again, and thus is much wiser than most men.
Besides love and sympathy, animals exhibit other qualities connected with the social instincts which in us would be called moral.
In the long history of humankind (and animal kind, too) those who learned to collaborate and improvise most effectively have prevailed.
It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change.
At some future period, not very distant as measured by centuries, the civilized races of man will almost certainly exterminate, and replace the savage races throughout the world.
I cannot persuade myself that a beneficent and omnipotent God would have designedly created parasitic wasps with the express intention of their feeding within the living bodies of Caterpillars.
To kill an error is as good a service as, and sometimes even better than, the establishing of a new truth or fact.
If the misery of the poor be caused not by the laws of nature, but by our institutions, great is our sin.
In the long history of humankind (and animal kind, too) those who learned to collaborate and improvise most effectively have prevailed.
Ignorance more frequently begets confidence than does knowledge: it is those who know little, and not those who know much, who so positively assert that this or that problem will never be solved by science.
In the long history of humankind (and animal kind, too) those who learned to collaborate and improvise most effectively have prevailed.
An American monkey, after getting drunk on brandy, would never touch it again, and thus is much wiser than most men.