3 Here's how we can be sure that we know God in the right way: Keep his commandments. 4 If someone claims, "I know him well!" but doesn't keep his commandments, he's obviously a liar. His life doesn't match his words. 5 But the one who keeps God's word is the person in whom we see God's mature love. This is the only way to be sure we're in God. 6 Anyone who claims to be intimate with God ought to live the same kind of life Jesus lived.
7 My dear friends, I'm not writing anything new here. This is the oldest commandment in the book, and you've known it from day one. It's always been implicit in the Message you've heard. 8 On the other hand, perhaps it is new, freshly minted as it is in both Christ and you - the darkness on its way out and the True Light already blazing! 9 Anyone who claims to live in God's light and hates a brother or sister is still in the dark. 10 It's the person who loves brother and sister who dwells in God's light and doesn't block the light from others. 11 But whoever hates is still in the dark, stumbles around in the dark, doesn't know which end is up, blinded by the darkness.
Matthew Henry's Commentary on 1 John 2:3-11
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.