Many Christians are tempted much in this world because they tamper much with the world; they have not fled to Jesus as their city of separation. They have not become exiles with Him and for His sake. Although He says, “Come out from among them, and be ye separate...and I will receive you,” yet they flee not, and the tempter often overtakes them.
Separation from the world unto God is about the last refuge that is sought after. Jesus must be our All in all if we would be perfectly sheltered from the curse—the world, the flesh, and the devil.