The deepest sin against the human mind is to believe things without evidence.
If I have seen further it is by standing on the shoulders of Giants.
All stable processes we shall predict. All unstable processes we shall control.
With educated people, I suppose, punctuation is a matter of rule; with me it is a matter of feeling. But I must say I have great respect for the semi-colon; it's a useful little chap.
What we know is a drop, what we don't know is an ocean.
I cannot live without books.
If one cannot enjoy reading a book over and over again, there is no use in reading it at all.
He who would learn to fly one day must first learn to stand and walk and run and climb and dance; one cannot fly into flying.
To educate a person in the mind but not in morals is to educate a menace to society.
Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.
The reading of all good books is like conversation with the finest men of past centuries.
Investigate, educate and organize the country must progress, productive works and industries are the main avenues at present next to education for the advancement of the country
Action not backed by knowledge and knowledge not translatable into action, both can not stand the test of time.
Science is what we have learned about how to keep from fooling ourselves.
Reading is to the mind what exercise is to the body.
Dare to think for yourself.
If you can't explain it simply, you don't understand it well enough.
No power and no treasure can outweigh the extension of our knowledge.
To every action there is always an equal and opposite or contrary, reaction
The first principle is that you must not fool yourself and you are the easiest person to fool.
The more I read, the more I acquire, the more certain I am that I know nothing.