I decided to teach because I think that any person who studies philosophy has to be involved actively.
What is now proved was once only imagined.
No power and no treasure can outweigh the extension of our knowledge.
I cannot live without books.
Dare to think for yourself.
Courage, conviction and confidence.
Make it a rule never to give a child a book you would not read yourself.
If the facts don't fit the theory, change the facts.
Science is what we have learned about how to keep from fooling ourselves.
If you're not learning while you're earning, you're cheating yourself out of the better portion of your compensation.
What sculpture is to a block of marble, education is to a human soul.
Education is an ornament for the prosperous, a refuge for the unfortunate.
Science is not only a disciple of reason but, also, one of romance and passion.
The highest result of education is tolerance.
Knowledge becomes evil if the aim be not virtuous.
I have just three things to teach: simplicity, patience, compassion. These three are your greatest treasures.
Know what you are talking about.
It is possible to fly without motors, but not without knowledge and skill.
A little knowledge that acts is worth infinitely more than much knowledge that is idle.
If you're teaching today what you were teaching five years ago, either the field is dead or you are.
Real knowledge is to know the extent of one's ignorance.