John did not feel strong enough to stand the great pressure of temptation he would meet in society. He feared his character would be molded according to the prevailing customs of the Jews, and he chose the wilderness as his school, in which his mind could be properly educated and disciplined from God's great book of nature. In the wilderness, John could the more readily deny himself and bring his appetite under control, and dress in accordance to natural simplicity. And there was nothing in the wilderness that would take his mind from meditation and prayer. Satan had access to John, even after he had closed every avenue in his power through which he would enter. But his habits of life were so pure and natural that he could discern the foe, and had strength of spirit and decision of character to resist him.
The book of nature was open before John with its inexhaustible store of varied instruction. He sought the favor of God, and the Holy Spirit rested upon him, and kindled in his heart a glowing zeal to do the great work of calling the people to repentance, and to a higher and holier life. John was fitting himself, by the privations and hardships of his secluded life, to so control all his physical and mental powers that he could stand among the people as unmoved by surrounding circumstances as the rocks and mountains of the wilderness that had surrounded him for thirty years.
The Spirit of Prophecy, Vol. 2, p.47.