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.
Study without desire spoils the memory, and it retains nothing that it takes in.
The deepest sin against the human mind is to believe things without evidence.
The whole of science is nothing more than a refinement of everyday thinking.
Everyone you meet always asks if you have a career, are married, or own a house as if life was some kind of grocery list. But no one ever asks you if you are happy.
Anger is a wind which blows out the lamp of the mind.
Maybe true travel is not the transportation of the body, but a change of perception, renewing the mind.
Spoon feeding in the long run teaches us nothing but the shape of the spoon.
Never mistake motion for action.
Give a girl an education and introduce her properly into the world, and ten to one but she has the means of settling well, without further expense to anybody.