If conversion makes no improvements in a man's outward actions then I think his 'conversion' was largely imaginary.

The central Christian belief is that Christ's death has somehow put us right with God and given us a fresh start. Theories as to how it did this are another matter. A good many different theories have been held as to how it works; what all Christians are agreed on is that it does work.

An 'impersonal God'-well and good. A subjective God of beauty, truth and goodness, inside our own heads-better still. A formless life-force surging through us, a vast power which we can tap-best of all. But God himself, alive, pulling at the other end of the cord, perhaps approaching at an infinite speed, the hunter, King, husband-that is quite another matter.

Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important.

The devil loves 'curing' a small fault by giving you a great one.

In God there is no hunger that needs to be filled, only plenteousness that desires to give.

Above all, do not attempt to use science (I mean, the real sciences) as a defence against Christianity. They will positively encourage him to think about realities he can’t touch and see.