Everyone who has this hope set on him purifies himself, even as he is pure.
And every man that hath this hope in him purifieth himself: The phrase "and every man" lets us know that anyone who is willing to commit his life to the Lord can have this hope. "This hope" is the desire and expectation concerning the second coming of Jesus Christ--when we shall see Him, we shall be like Him. This hope is a tremendous incentive toward holiness in life. "In" is epi and literally means "upon." Our hope is resting upon the coming Christ. Vincent says that it is better rendered "set on Him." Christ is the foundation of our hope. This hope that hinges on Christ is the impetus that prompts the Christian to purify himself.