A man sees in the world what he carries in his heart.
Energy will do anything that can be done in the world; and no talents, no circumstances, no opportunities will make a two-legged animal a man without it.
Being brilliant is no great feat if you respect nothing.
The credit of advancing science has always been due to individuals and never to the age.
Correction does much, but encouragement does more.
When ideas fail, words come in very handy.