When you know better you do better.

Better know nothing than half-know many things.

The man who is fond of books is usually a man of lofty thought, and elevated opinions.

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.

The secret of life is not enjoyment but education through experience.

The fullness of knowledge only comes through the awareness of ignorance.

It is possible to fly without motors, but not without knowledge and skill.

Imagination is more important than knowledge.

The knowledge of all things is possible

It is not enough for the teacher to love the child. She must first love and understand the universe. She must prepare herself, and truly work at it.

I do not know how to teach philosophy without becoming a disturber of the peace.

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

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.

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

Evil being the root of mystery, pain is the root of knowledge.

Most people have never learned that one of the main aims in life is to enjoy it.

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

Human behavior flows from three main sources: desire, emotion, and knowledge

Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.

Necessity is the mother of invention.

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