Many much-learned men have no intelligence.
Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.
A thought is an idea in transit.
Just when I thought there wasn't room enough for another thought in my head, I had this great idea.
I am so clever that sometimes I don't understand a single word of what I am saying.
A little knowledge is a dangerous thing. So is a lot.
Necessity is the mother of invention.
All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.
That men do not learn very much from the lessons of history is the most important of all the lessons that history has to teach.
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.
Opinion is the medium between knowledge and ignorance.
Real knowledge is to know the extent of one's ignorance.
Make it a rule never to give a child a book you would not read yourself.
The knowledge of all things is possible
Most people have never learned that one of the main aims in life is to enjoy it.
Science is what we have learned about how to keep from fooling ourselves.
No man's knowledge here can go beyond his experience.
Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.
Don't worry that children never listen to you; worry that they are always watching you.
Education is the most powerful weapon which you can use to change the world.
The delight of opening a new pursuit, or a new course of reading, imparts the vivacity and novelty of youth even to old age.