The Enemy wants to bring the man to a state of mind in which he could design the best cathedral in the world, and know it to be the best, and rejoice in the fact, without being any more (or less) or otherwise glad at having done it than he would be if it had been done by another. The Enemy wants him, in the end, to be so free from any bias in his own favour that he can rejoice in his own talents as frankly and gratefully as in his neighbour's talents--or in a sunrise, an elephant, or a waterfall.
Good and evil both increase at compound interest. That is why the little decisions you and I make every day are of such infinite importance. The smallest good act today is the capture of a strategic point from which, a few months later, you may be able to go on to victories you never dreamed of. An apparently trivial indulgence in lust or anger today is the loss of a ridge or railway line or bridgehead from which the enemy may launch an attack otherwise impossible.
But if you are a poor creature--poisoned by a wretched up-bringing in some house full of vulgar jealousies and senseless quarrels--saddled, by no choice of your own, with some loathsome sexual perversion--nagged day in and day out by an inferiority complex that makes you snap at your best friends--do not despair. He knows all about it. You are one of the poor whom He blessed. He knows what a wretched machine you are trying to drive. Keep on. Do what you can. One day He will fling it on the scrap-heap and give you a new one. And then you may astonish us all - not least yourself.