Everyone who has this hope set on him purifies himself, even as he is pure.
      IV. Urges the engagement of these sons of God to the prosecution of holiness: And every man that hath this hope in him purifies himself even as he is pure,1 John 3:3; 1 John 3:3. The sons of God know that their Lord is holy and pure; he is of purer heart and eyes than to admit any pollution or impurity to dwell with him. Those then who hope to live with him must study the utmost purity from the world, and flesh, and sin; they must grow in grace and holiness. Not only does their Lord command them to do so, but their new nature inclines them so to do; yea, their hope of heaven will dictate and constrain them so to do. They know that their high priest is holy, harmless, and undefiled. They know that their Go and Father is the high and holy one, that all the society is pure and holy, that their inheritance is an inheritance of saints in light. It is a contradiction to such hope to indulge sin and impurity. And therefore, as we are sanctified by faith, we must be sanctified by hope. That we may be saved by hope we must be purified by hope. It is the hope of hypocrites, and not of the sons of God, that makes an allowance for the gratification of impure desires and lusts.