Old Fables New Morals - Hercules and the Wagoner

So, there was this wagoner driving his cart on a rainy day when his wheels sank down in the slush and the cart would not move. The poor chap goes down on his knees and prays to Hercules to help him. Hercules appears and says, "Put your shoulder to the wheel and push it yourself. You will find your prayers fruitless if you do not first try to help yourself first." The moral, apparently, was