21 My dear children, I am writing this to you so that you will not sin. But if anyone does sin, we have an advocate who pleads our case before the Father. He is Jesus Christ, the one who is truly righteous. 2 He himself is the sacrifice that atones for our sins-and not only our sins but the sins of all the world.
3 And we can be sure that we know him if we obey his commandments. 4 If someone claims, "I know God," but doesn't obey God's commandments, that person is a liar and is not living in the truth. 5 But those who obey God's word truly show how completely they love him. That is how we know we are living in him. 6 Those who say they live in God should live their lives as Jesus did.
7 Dear friends, I am not writing a new commandment for you; rather it is an old one you have had from the very beginning. This old commandment-to love one another-is the same message you heard before.
Matthew Henry's Commentary on 1 John 2:1-7
Commentary on 1 John 2:1-2
(Read 1 John 2:1-2)
When have an Advocate with the Father; one who has undertaken, and is fully able, to plead in behalf of every one who applies for pardon and salvation in his name, depending on his pleading for them. He is "Jesus," the Saviour, and "Christ," the Messiah, the Anointed. He alone is "the Righteous One," who received his nature pure from sin, and as our Surety perfectly obeyed the law of God, and so fulfilled all righteousness. All men, in every land, and through successive generations, are invited to come to God through this all-sufficient atonement, and by this new and living way. The gospel, when rightly understood and received, sets the heart against all sin, and stops the allowed practice of it; at the same time it gives blessed relief to the wounded consciences of those who have sinned.
Commentary on 1 John 2:3-11
(Read 1 John 2:3-11)
What knowledge of Christ can that be, which sees not that he is most worthy of our entire obedience? And a disobedient life shows there is neither religion nor honesty in the professor. The love of God is perfected in him that keeps his commandments. God's grace in him attains its true mark, and produces its sovereign effect as far as may be in this world, and this is man's regeneration; though never absolutely perfect here. Yet this observing Christ's commands, has holiness and excellency which, if universal, would make the earth resemble heaven itself. The command to love one another had been in force from the beginning of the world; but it might be called a new command as given to Christians. It was new in them, as their situation was new in respect of its motives, rules, and obligations. And those who walk in hatred and enmity to believers, remain in a dark state. Christian love teaches us to value our brother's soul, and to dread every thing hurtful to his purity and peace. Where spiritual darkness dwells, in mind, the judgment, and the conscience will be darkened, and will mistake the way to heavenly life. These things demand serious self-examination; and earnest prayer, that God would show us what we are, and whither we are going.