Seeing ye have purified your souls in obeying the truth through the Spirit unto unfeigned love of the brethren, see that ye love one another with a pure heart fervently: Seeing ye have purified your souls - Having purified your souls, in obeying the truth - by believing in Christ Jesus, through the influence and teaching of the Spirit; and giving full proof of it by unfeigned love to the brethren; ye love one another, or ye will love each other, with a pure heart fervently. These persons,
First, heard the truth, that is, the Gospel; thus called in a great variety of places in the New Testament, because it contains The truth without mixture of error, and is the truth and substance of all the preceding dispensations by which it was typified.
Secondly, they obeyed that truth, by believing on Him who came into the world to save sinners.
Thirdly, through this believing on the Son of God, their hearts were purified by the word of truth applied to them by the Holy Spirit.
Fourthly, the love of God being shed abroad in their hearts by the Holy Ghost, they loved the brethren with pure hearts fervently, εκτενως, intensely or continually; the full proof that their brotherly love was unfeigned, φιλαδελφιαν ανυποκριτον, a fraternal affection without hypocrisy.