It rarely adds anything to say, "In my opinion" - not even modesty. Naturally a sentence is only your opinion; and you are not the Pope.

A good teacher feels his way, looking for response.

No good has ever come from feeling guilty, neither intelligence, policy, nor compassion. The guilty do not pay attention to the object but only to themselves, and not even to their own interests, which might make sense, but to their anxieties.

Few great men could pass personnel.

There is such a thing as food and such a thing as poison. But the damage done by those who pass off poison as food is far less than that done by those who generation after generation convince people that food is poison.

There is only one curriculum, no matter what the method of education: what is basic and universal in human experience and practice, the underlying structure of culture.

All men are creative but few are artists.