In the one branch he most needed
Teachers affect eternity. There is no telling where their influence stops.
A senator is like a begonia - showy but useless.
No man likes to have his intelligence or good faith questioned, especially if he has doubts about it himself.
The chief wonder of education is that it does not ruin everybody concerned in it, teachers and taught.
I firmly believe, that before many centuries more, science will be the master of man. The engines he will have invented will be beyond his strength to control. Someday, science shall have the existence of mankind in its power, and the human race commit suicide by blowing up the world.