The most elusive knowledge of all is self-knowledge and it is usually acquired laboriously through experience outside the classroom.

The greatest danger of traditional education is that learning may remain purely verbal.

The most elusive knowledge of all is self-knowledge.

What is important to a relationship is a harmony of emotional roles and not too great a disparity in the general level of intelligence.

The most elusive knowledge of all is self-knowledge and it is usually acquired laboriously through experience outside the classroom.