1. Something Old
7 Beloved, I am writing you no new commandment, but an old commandment that you had from the beginning. The old commandment is the word that you have heard. 1 John 2:7 (ESV)

37 And he said to him, “You shall love the Lord your God with all your heart and with all your soul and with all your mind. 38 This is the great and first commandment. 39 And a second is like it: You shall love your neighbor as yourself. Matthew 22:37-39 (ESV)

18   . . .  you shall love your neighbor as yourself: I am the LORD. Leviticus 19:18 (ESV)

2. Something New
8 At the same time, it is a new commandment that I am writing to you, which is true in him and in you, because the darkness is passing away and the true light is already shining. 1 John 2:8 (ESV)

34 A new commandment I give to you, that you love one another: just as I have loved you, you also are to love one another. 35 By this all people will know that you are my disciples, if you have love for one another.” John 13:34-35 (ESV)

33 For this is the covenant that I will make with the house of Israel after those days, declares the LORD: I will put my law within them, and I will write it on their hearts . . .  Jeremiah 31:33 (ESV)

46 I have come into the world as light, so that whoever believes in me may not remain in darkness.
John 12:46 (ESV)

9 For the commandments, “You shall not commit adultery, You shall not murder, You shall not steal, You shall not covet,” and any other commandment, are summed up in this word: “You shall love your neighbor as yourself.” Romans 13:9 (ESV)

26 I made known to them your name, and I will continue to make it known, that the love with which you have loved me may be in them, and I in them.” John 17:26 (ESV)

3. Something Blinded
9 Whoever says he is in the light and hates his brother is still in darkness.  . . . 11 But whoever hates his brother is in the darkness and walks in the darkness, and does not know where he is going, because the darkness has blinded his eyes. 1 John 2:9-11 (ESV)

35 So Jesus said to them, “The light is among you for a little while longer. Walk while you have the light, lest darkness overtake you. The one who walks in the darkness does not know where he is going. John 12:35 (ESV)

4. Something True
10 Whoever loves his brother abides in the light, and in him there is no cause for stumbling.

1 If I speak in the tongues of men and of angels, but have not love, I am a noisy gong or a clanging cymbal. 2 And if I have prophetic powers, and understand all mysteries and all knowledge, and if I have all faith, so as to remove mountains, but have not love, I am nothing. 3 If I give away all I have, and if I deliver up my body to be burned, but have not love, I gain nothing.
1 Corinthians 13:1-3 (ESV)