Seeing you have purified your souls in your obedience to the truth through the Spirit in sincere brotherly affection, love one another from the heart fervently:
(17) It is better to keep the tense of the participle, — “Having purified (or, since ye have purified) your souls by obeying the truth through the Spirit to an unfeigned love of the brethren, love ye one another fervently from a pure heart; having been born again,” etc. 