Naivete in grownups is often charming; but when coupled with vanity it is indistinguishable from stupidity.

Even the sober desire for progress is sustained by faith—faith in the intrinsic goodness of human nature and in the omnipotence of science. It is a defiant and blasphemous faith, not unlike that held by the men who set out to build a "city and a tower, whose top may reach unto heaven" and who believed that "nothing will be restrained from them, which they have imagined to do.

However different the holy causes people die for, they perhaps die basically for the same thing.

It is startling to realize how much unbelief is necessary to make belief possible.

The autonomous individual, striving to realize himself and prove his worth, has created all that is great in literature, art, music, science and technology. The autonomous individual, also, when he can neither realize himself nor justify his existence by his own efforts, is a breeding call of frustration, and the seed of the convulsions which shake our world to its foundations.

We never say so much as when we do not quite know what we want to say. We need few words when we have something to say, but all the words in all the dictionaries will not suffice when we have nothing to say and want desperately to say it.

We have rudiments of reverence for the human body, but we consider as nothing the rape of the human mind.