Common sense is the collection of prejudices acquired by age eighteen.
When I am attacked by gloomy thoughts, nothing helps me so much as running to my books. They quickly absorb me and banish the clouds from my mind.
Imagination is more important than knowledge.
Courage, conviction and confidence.
Necessity is the mother of invention.
Words can be like X-rays if you use them properly - they'll go through anything. You read and you?re pierced.
Just when I thought there wasn't room enough for another thought in my head, I had this great idea.
Physics is like sex: sure, it may give some practical results, but that's not why we do it.
Liberty without Learning is always in peril and Learning without Liberty is always in vain.
My alma mater was books, a good library.... I could spend the rest of my life reading, just satisfying my curiosity.
Although modesty is natural to man, it is not natural to children. Modesty only begins with the knowledge of evil.
The highest activity a human being can attain is learning for understanding, because to understand is to be free.
I am a part of everything that I have read.
Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.
To every action there is always an equal and opposite or contrary, reaction
Opinion is the medium between knowledge and ignorance.
Books are for people who wish they were somewhere else.
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.
No power and no treasure can outweigh the extension of our knowledge.
The progressive development of man is vitally dependent on invention.
The real solution lies in a world in which charity will have become unnecessary.