Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.
The delight of opening a new pursuit, or a new course of reading, imparts the vivacity and novelty of youth even to old age.
I do not know how to teach philosophy without becoming a disturber of the peace.
Human behavior flows from three main sources: desire, emotion, and knowledge
If the facts don't fit the theory, change the facts.
I think that kids have a greater capacity for processing things than we give them credit for.
Free the child's potential, and you will transform him into the world.
The whole of science is nothing more than a refinement of everyday thinking.
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.
Science is a rising force, It is creating a new world about us. It needs to be watched and pressed into service, and in any case, it would be courting disaster to ignore it.
A little knowledge that acts is worth infinitely more than much knowledge that is idle.
I cannot teach anybody anything. I can only make them think
It isn't what we don't know that gives us trouble, it's what we know that ain't so.
Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.
What is now proved was once only imagined.
The man who is fond of books is usually a man of lofty thought, and elevated opinions.
Better know nothing than half-know many things.
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.
All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.
Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.
Never help a child with a task at which he feels he can succeed.