Common sense consists of those layers of prejudice laid down before the age of 18.
Cherish the questions, for the answers keep changing.
The world will not evolve past its current state of crisis by using the same thinking that created the situation.
An expert is a person who has few new ideas; a beginner is a person with many.
...and knowledge is one of the finest attributes of man - though often it is most loudly voiced by those who strive for it the least.
The only real valuable thing is intuition.