Charles Darwin quotes
Ignorance more frequently begets confidence than does knowledge: it is those who know little, not those who know much, who so positively assert that this or that problem will never be solved by science. 
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 every week. 
If the misery of the poor be caused not by the laws of nature, but by our institutions, great is our sin.