We should think of the church as an orchestra in which the different churches play on different instruments while a Divine Conductor calls the tune.

The modern world belongs to the half-educated, a rather difficult class, because they do not realize how little they know.

If the universe is running down like a clock, the clock must have been wound up at a date which we could name if we knew it. The world, if it is to have an end in time, must have had a beginning in time.

The happy people are those who are producing something.

Nobody is bored when he is trying to make something that is beautiful or to discover something that is true.

For better or worse, man is the tool-using animal, and as such he has become the lord of creation. When he is lord also of himself, he will deserve his self-chosen title homo sapiens.

Don't break the silence unless you can improve on it.