There is no greater joy for me than looking at the sky on a clear night with an attention so concentrated that all my other thoughts disappear; then one can think that the stars enter into one's soul.

If we concentrate our attention on trying to solve a problem of geometry, and if at the end of an hour we are no nearer to doing so than at the beginning, we have nevertheless been making progress each minute of that hour in another more mysterious dimension. Without knowing or feeling it, this apparent barren affort has brought more light into the soul.

In what concerns divine things, belief is not appropriate. Only certainty will do. Anything less than certainty is unworthy of God.

Imaginary evil is romantic and varied; real evil is gloomy, monotonous, barren, boring. Imaginary good is boring; real good is always new, marvelous, intoxicating.

Everybody knows that really intimate conversation is only possible between two or three. As soon as there are six or seven, collective language begins to dominate. That is why it is a complete misinterpretation to apply to the Church the words 'Wheresoever two or three are gathered together in my name, there am I in the midst of them.' Christ did not say two hundred, or fifty, or ten. He said two or three.

He who has not God in himself cannot feel His absence.

When a contradiction is impossible to resolve except by a lie, then we know that it is really a door.