By itself photography cannot deal with the unseen, the remote, the internal, the abstract, it does not speak of Man, only of a man ; not of Tree, only a tree.

A metaphor is not an ornament. It is an organ of perception. Through metaphors, we see the world as one thing or another.

There is no way to help a learner to be disciplined, active, and thoroughly engaged unless he perceives a problem to be a problem or whatever is to-be-learned as worth learning, and unless he plays an active role in determining the process of solution.

The effects of technology are always unpredictable. But they are not always inevitable.

Certainty abolishes hope, and robs us of renewal.

Everything we know has its origins in questions. Questions, we might say, are the principal intellectual instruments available to human beings.

In Russia, writers with serious grievances are arrested, while in America they are merely featured on television talk shows, where all that is arrested is their development.