Everything you are against weakens you. Everything you are for empowers you.
Difficulties are meant to rouse, not discourage. The human spirit is to grow strong by conflict.
— William Ellery Channing
Imagination is more important than knowledge...
It is the supreme art of the teacher to awaken joy in creative expression and knowledge.
We don't know a millionth of one percent about anything.
I wrote somewhere once that the third-rate mind was only happy when it was thinking with the majority, the second-rate mind was only happy when it was thinking with the minority, and the first-rate mind was only happy when it was thinking.
Learning is not attained by chance, it must be sought for with ardor and attended to with diligence.
And I may add that it taught me something about the limitations of the small . . . orthodox scientist who won't recognize as knowledge, or as reality, any information that doesn't fit into the already existent science.
Dangerous is a people's voice charged with wrath.