Beloved, let us love one another, for love is from God, and whoever loves has been born of God and knows God. Anyone who does not love does not know God, because God is love. In this the love of God was made manifest among us, that God sent his only Son into the world, so that we might live through him. In this is love, not that we have loved God but that he loved us and sent his Son to be the propitiation for our sins.
Beloved, if God so loved us, we also ought to love one another . . .
Whoever confesses that Jesus is the Son of God, God abides in him, and he in God. So we have come to know and to believe the love that God has for us. God is love, and however abides in love abides in God, and God abides in him. By this is love perfected with us, so that we may have confidence for the day of judgment, because as he is so also are we in this world. There is no fear in love, but perfect love casts out fear.
(1 John 4:7-18)
John really takes the cake for compression. In approximately ten verses he jams in more truth than most pastors do in an hour of preaching (sorry, pastors . . . hope you aren't offended that I am comparing you with the Apostle John :).