Because of the Cross, God can be both just towards sin and yet mercifully justifying to sinners.
Timothy KellerThere is no way to have a real relationship without becoming vulnerable to hurt. Christmas tells us that God became breakable and fragile. God became someone we could hurt. Why? To get us back... No other religion-whethe r secularism, Greco-Roman paganism, Eastern religion, Judaism, or Islam-believes God became breakable or suffered or had a body.
Timothy Keller