I am not apt to follow blindly the lead of other men.
How paramount the future is to the present when one is surrounded by children.
Man tends to increase at a greater rate than his means of subsistence.
Man is descended from a hairy, tailed quadruped, probably arboreal in its habits.
A scientific man ought to have no wishes, no affections, - a mere heart of stone.
It is a cursed evil to any man to become as absorbed in any subject as I am in mine.
The very essence of instinct is that it's followed independently of reason.
Animals, whom we have made our slaves, we do not like to consider our equal.
A man who dares to waste one hour of time has not discovered the value of life.
A man's friendships are one of the best measures of his worth.