Thematic Bible: Who purifies their soul

Behold what manner of love the Father has given us, that we should be called children of God. Therefore the world does not know us, because it did not know Him. Beloved, now we are children of God, and it has not yet been revealed what we shall be. But we know that when He shall be revealed, we shall be like Him, for we shall see Him as He is. And everyone who has this hope on him purifies himself, even as that One is pure.

knowing that you were not redeemed with corruptible things, silver or gold, from your vain manner of life handed down from your fathers, but with the precious blood of Christ, as of a lamb without blemish and without spot; indeed having been foreknown before the foundation of the world, but revealed in the last times for you, read more.
those believing in God through Him, He who raised Him up from the dead and gave Him glory, so that your faith and hope might be in God. Purifying your souls in the obedience of the truth through the Spirit to unfeigned love of the brothers, love one another fervently out of a pure heart, having been born again, not of corruptible seed, but of incorruptible, through the living Word of God, and abiding forever.