Probably the greatest challenge to people of any age, particularly young people, and the most difficult thing you will face in mortal life is to learn to control your thoughts. As a man “thinketh in his heart, so is he.” ( Prov. 23:7 .) One who can control his thoughts has conquered himself. When I was about ten years old, we lived in a home surrounded by an orchard. There never seemed to be enough water for the trees. The ditches, always fresh-plowed in the spring, would soon be filled with weeds. One day, in charge of the irrigating turn, I found myself in trouble. As the water moved down the rows choked with weeds, it would flood in every direction. I raced through the puddles trying to build up the bank. As soon as I had one break patched up, there would be another. A neighbor came through the orchard. He watched for a moment, and then with a few vigorous strokes of the shovel he cleared the ditch bottom and allowed the water to course through the channel he had made. “If ...