The greatest danger to Christianity is, I contend, not heresies, not heterodoxies, not atheists, not profane secularism - no, but the kind of orthodoxy which is cordial drivel, mediocrity served up sweet. There is nothing that so insidiously displaces the majestic as cordiality.

The truth must essentially be regarded as in conflict with this world; the world has never been so good, and will never become so good that the majority will desire the truth.

To be a teacher in the right sense is to be a learner. I am not a teacher, only a fellow student.

If the ethical - that is, social morality- is the highest ... then no categories are needed other than the Greek philosophical categories.

Most people live dejectedly in worldly joys or sorrows. They sit on the sidelines and do not join the dance.

Human relations are like the irregular verbs in a number of languages where nearly all verbs are irregular.

One can advise comfortably from a safe port.