Chastity is the most unpopular of the Christian virtues. There is no getting away from it; the old Christian rule is, "Either marriage, with completely faithfulness to your partner, or else total abstinence."

I could never have gone far in any science because on the path of every science the lion Mathematics lies in wait for you.

Man approaches God most nearly when he is in one sense least like God. For what can be more unlike than fullness and need, sovereignty and humility, righteousness and penitence, limitless power and a cry for help?

Enemy-occupied territory - that is what this world is.

No doubt those who really founded modern science were usually those whose love of truth exceeded their love of power.

It is, of course, quite true that God will not love you any less, or have less use for you, if you happen to have been born with a very second-rate brain.

We have a strange illusion that mere time cancels sin. But mere time does nothing either to the fact or to the guilt of a sin.