From John Piper’s The Dawning of Indestructible Joy:
“John 3:16  – ‘God so loved . . .’ The ‘so’ here doesn’t mean an amount of love, but a way of loving. He doesn’t mean, God loved so much, but God loved this way. ‘God so loved’ means ‘God thus loved.’
â€How? What is the way God loved? He loved such ‘that he gave his only Son.’ And we know that this giving was a giving up to rejection and death. ‘He came to his own, and his own people did not receive him’ (John 1: 11). Instead they killed him. And Jesus said of all this, ‘I glorified you [Father] on earth, having accomplished the work that you gave me to do’ (John 17: 4). So when the Father gave his only begotten Son, he gave him to die. That’s the kind of love the Father has. It is a giving love. It gives his most precious treasure—his Son.
“Meditate on that this Advent. It was a very costly love. A very powerful love. A very rugged, painful love. The meaning of Christmas is the celebration of this love. ‘God so loved . . .’ And wonder of wonders, God gives this costly love to an undeserving world of sinners, like us.â€