A child educated only at school is an uneducated child.
Real knowledge is to know the extent of one's ignorance.
Knowledge, Action, Devotion are complementary to each other.
I am indebted to my father for living, but to my teacher for living well.
A little knowledge that acts is worth infinitely more than much knowledge that is idle.
The first principle is that you must not fool yourself and you are the easiest person to fool.
If you can't explain it simply, you don't understand it well enough.
The task of a writer is not to solve the problem but to state the problem correctly.
It is possible to fly without motors, but not without knowledge and skill.
Any knowledge that doesn't lead to new questions quickly dies out: it fails to maintain the temperature required for sustaining life.
The fullness of knowledge only comes through the awareness of ignorance.
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.
Make it a rule never to give a child a book you would not read yourself.
All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.
Liberty without Learning is always in peril and Learning without Liberty is always in vain.
It isn't what we don't know that gives us trouble, it's what we know that ain't so.
If you want the present to be different from the past, study the past.
Learning gives creativity, Creativity leads to thinking, Thinking provides knowledge, Knowledge makes you great.
Although modesty is natural to man, it is not natural to children. Modesty only begins with the knowledge of evil.
A witty saying proves nothing.
The secret of life is not enjoyment but education through experience.