The highest activity a human being can attain is learning for understanding, because to understand is to be free.
Books are as useful to a stupid person as a mirror is useful to a blind person.
It isn't what we don't know that gives us trouble, it's what we know that ain't so.
It is better to know how to learn than to know.
The task of a writer is not to solve the problem but to state the problem correctly.
God created man in His own image, says the Bible; philosophers reverse the process: they create God in theirs.
I cannot teach anybody anything. I can only make them think
Real learning comes about when the competitive spirit has ceased.
The ability to observe without evaluating is the highest form of intelligence.
What is now proved was once only imagined.
The delight of opening a new pursuit, or a new course of reading, imparts the vivacity and novelty of youth even to old age.
Knowing is not enough; we must apply. Willing is not enough; we must do.
A child educated only at school is an uneducated child.
The first principle is that you must not fool yourself and you are the easiest person to fool.
No power and no treasure can outweigh the extension of our knowledge.
To every action there is always an equal and opposite or contrary, reaction
Imagination is more important than knowledge.
Words can be like X-rays if you use them properly - they'll go through anything. You read and you?re pierced.
The real solution lies in a world in which charity will have become unnecessary.
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.
Opinion is the medium between knowledge and ignorance.