Thematic Bible: Who purifies their soul

Behold what manner of love the Father hath bestowed upon us, that we should be called children of God; and'such we are. For this cause the world knoweth us not, because it knew him not. Beloved, now are we children of God, and it is not yet made manifest what we shall be. We know that, if he shall be manifested, we shall be like him; for we shall see him even as he is. And every one that hath this hope'set on him purifieth himself, even as he is pure.

knowing that ye were redeemed, not with corruptible things, with silver or gold, from your vain manner of life handed down from your fathers; but with precious blood, as of a lamb without spot, even the blood of Christ: who was foreknown indeed before the foundation of the world, but was manifested at the end of times for your sake, read more.
who through him are believers in God, that raised him from the dead, and gave him glory; so that your faith and hope might be in God. Seeing ye have purified your souls in your obedience to the truth unto unfeigned love of the brethren, love one another from the heart fervently: having been begotten again, not of corruptible seed, but of incorruptible, through the word of God, which liveth and abideth.