1 Peter 1:14-16, 22-23

as obedient children, not fashioning yourselves according to the former lusts in your ignorance: but as he which hath called you is holy, so be ye holy in all manner of conversation; because it is written, Be ye holy; for I am holy.

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: being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever.