It happens, especially if you're tired. I mean that moment of semi-panic on the eve of Christmas when you think of all the gifts left to buy, and all the cards not sent! It takes energy to plan and do good things, and energy is often sadly lacking, even for the saints. At times, we might even be tempted to murmur like Scrooge in Charles Dickens’ A Christmas Carol, "Bah, humbug!" But we don't mean it. In our heart of hearts, we know that as long as we are receiving, it is good and right (and a privilege) also to be giving. Giving does not get us to heaven, but it does bring heaven down to us.…