Commentaries:
Barnes' Notes
And every man that hath this hope in him - This hope of seeing the Saviour, and of being made like him; that is, every true Christian. On the nature and influence of hope, see the notes at Romans 8:24-25.
Purifieth himself - Makes himself holy. That is, under the influence of this hope of being like the Saviour, he puts forth those efforts in struggling against sin, and in overcoming his evil propensities, which are necessary to make him pure. The apostle would not deny that for the success of these efforts we are dependent on divine aid; but he brings into view, as is often done in the sacred writings, the agency of man himself as essentially connected with success. Compare Philippians 2:12. The particular thought here is, that the hope of being like Christ, and of being permitted to dwell with him, will lead a man to earnest efforts to become holy, and will be actually followed by such a result.
Even as he is pure - The same kind of purity here, the same degree hereafter. That is, the tendency of such a hope is to make him holy now, though he may be imperfect; the effect will be to make him "perfectly" holy in the world to come. It cannot be shown from this passage that the apostle meant to teach that anyone actually becomes as pure in the present life as the Saviour is, that is, becomes perfectly holy; for all that is fairly implied in it is, that those who have this hope in them aim at the same purity, and will ultimately obtain it. But the apostle does not say that it is attained in this world. If the passage did teach this, it would teach it respecting everyone who has this hope, and then the doctrine would be that no one can be a Christian who does not become absolutely perfect on earth; that is, not that some Christians may become perfect here, but that all actually do. But none, it is presumed, will hold this to be a true doctrine. A true Christian does not, indeed, habitually and willfully sin; but no one can pretend that all Christians attain to a state of sinless perfection on earth, or are, in fact, as pure as the Saviour was. But unless the passage proves that every Christian becomes absolutely perfect in the present life, it does not Proverbs that in fact any do. It proves:
(1)That the tendency, or the fair influence of this hope, is to make the Christian pure;
(2)That all who cherish it will, in fact, aim to become as holy as the Saviour was; and,
(3)That this object will, at some future period, be accomplished. There is a world where all who are redeemed shall be perfectly holy.
Other Barnes' Notes entries containing 1 John 3:3:
James 3:17
1 John 3:4
1 John 3:7
1 John 5:18
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