Thematic Bible: Who purifies their soul

Behold, how great love the Father has bestowed on us, that we should be called the children of God! For this reason, the world knows us not, because it knew him not. Beloved, now are we the children of God, and it does not yet appear what we shall be: but we know that, when he shall appear, we shall be like him; for we shall see him as he is. And every one that has this hope in Him purifies himself, even as He is pure.

because you know that you were not redeemed with corruptible things, as silver or gold, from your vain mode of life received by tradition from your fathers, but with the precious blood of Christ, as of a lamb without spot and blemish, who was indeed foreordained before the foundation of the world, but manifested in these last times for you, read more.
who through him do believe in God who raised him from the dead, and gave him glory, that your faith and hope might be in God. Having purified your souls in obeying the truth through the Spirit, to unfeigned love of the brethren, love one another with a pure heart fervently, having been begotten again, not with corruptible seed, but with incorruptible, by the word of God, which lives and abides forever.