Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.

Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.

What is freedom of expression? Without the freedom to offend, it ceases to exist.

I learned very early the difference between knowing the name of something and knowing something.

The delight of opening a new pursuit, or a new course of reading, imparts the vivacity and novelty of youth even to old age.

Just when I thought there wasn't room enough for another thought in my head, I had this great idea.

Common sense is the collection of prejudices acquired by age eighteen.

I don't look on poetry as closed works. I feel they're going on all the time in my head and I occasionally snip off a length.

If you're not learning while you're earning, you're cheating yourself out of the better portion of your compensation.

It is beyond a doubt that all our knowledge begins with experience.

The only true wisdom is in knowing you know nothing.

Show me a family of readers, and I will show you the people who move the world.

For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.

There is one quality which one must possess to win, and that is definiteness of purpose, the knowledge of what one wants, and a burning desire to possess it.

What we know is a drop, what we don't know is an ocean.

Study without desire spoils the memory, and it retains nothing that it takes in.

The knowledge of all things is possible

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.

The only good is knowledge and the only evil is ignorance.

The most savage controversies are those about matters as to which there is no good evidence either way.

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.