The man who is fond of books is usually a man of lofty thought, and elevated opinions.
Common sense is the collection of prejudices acquired by age eighteen.
The progressive development of man is vitally dependent on invention.
Don't worry that children never listen to you; worry that they are always watching you.
Action not backed by knowledge and knowledge not translatable into action, both can not stand the test of time.
Learning never exhausts the mind.
The schools ain't what they used to be and never was.
All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.
In order to stave off covetouness, greed, and spite, citizens world over must be educated.
Show me a family of readers, and I will show you the people who move the world.
A witty saying proves nothing.
The only true wisdom is in knowing you know nothing.
It isn't what we don't know that gives us trouble, it's what we know that ain't so.
I am so clever that sometimes I don't understand a single word of what I am saying.
The more I read, the more I acquire, the more certain I am that I know nothing.
A cynic is a man who knows the price of everything, and the value of nothing.
Knowing is not enough; we must apply. Willing is not enough; we must do.
There is no authority who decides what is a good idea.
Education is a system of imposed ignorance.
The highest result of education is tolerance.
Science is not only a disciple of reason but, also, one of romance and passion.