knowing that you were redeemed, not with corruptible things, with silver or gold, from the useless way of life handed down from your fathers,
      1. He supposes that the gospel had already had such an effect upon them as to purify their souls while they obeyed it through the Spirit, and that it had produced at least an unfeigned love of the brethren; and thence he argues with them to proceed to a higher degree of affection, to love one another with a pure heart fervently, 1 Peter 1:22; 1 Peter 1:22. Learn, (1.) It is not to be doubted but that every sincere Christian purifies his soul. The apostle takes this for granted: Seeing you have, c. To purify the soul supposes some great uncleanness and defilement which had polluted it, and that this defilement is removed. Neither the Levitical purifications under the law, nor the hypocritical purifications of the outward man, can effect this. (2.) The word of God is the great instrument of a sinner's purification: Seeing you have purified your souls in obeying the truth. The gospel is called truth, in opposition to types and shadows, to error and falsehood. This truth is effectual to purify the soul, if it be obeyed, John 17:17. Many hear the truth, but are never purified by it, because they will not submit to it nor obey it. (3.) The Spirit of God is the great agent in the purification of man's soul. The Spirit convinces the soul of its impurities, furnishes those virtues and graces that both adorn and purify, such as faith (Acts 15:9), hope (1 John 3:3), the fear of God (Psalms 34:9), and the love of Jesus Christ. The Spirit excites our endeavours, and makes them successful. The aid of the Spirit does not supersede our own industry these people purified their own souls, but it was through the Spirit. (4.) The souls of Christians must be purified before they can so much as love one another unfeignedly. There are such lusts and partialities in man's nature that without divine grace we can neither love God nor one another as we ought to do; there is no charity but out of a pure heart. (5.) It is the duty of all Christians sincerely and fervently to love one another. Our affection to one another must be sincere and real, and it must be fervent, constant, and extensive.