A man was sleeping at night in his cabin when suddenly his room filled with light and the Savior appeared. The Lord told the man he had work for him to do, and showed him a large rock in front of his cabin.
The Lord explained that the man was to push against the rock with all his might. This the man did, day after day. For many years he toiled from sun up to sun down, his shoulders set squarely against the cold, massive surface of the unmoving rock, pushing with all his might. Each night the man returned to his cabin sore, and worn out, feeling that his whole day had been spent in vain.
Seeing that the man was showing signs of discouragement, the devil decided to enter the picture by placing thoughts into the man's weary mind "You have been pushing against that rock for a long time, and it hasn't budged. Why kill yourself over this? You are never going to move it." This gave the man the impression that the task was impossible and that he was a failure.
These thoughts discouraged and disheartened the man. "Why kill myself over this?" he thought. "I'll just put in my time, giving just the minimum effort and that will be good enough." And that is what he planned to do until one day he decided to make it a matter of prayer and take his troubled thoughts to the Lord.