You never really know someone until you know what's in their heart- what motivates them, what they're looking for, why they do what they do.
In the Gospel passage we just listened to, Jesus lays bare the heart of God. Why did he come? Because the Father sent him. Why did the Father send him? Because he "loved the world so much." God simply couldn't bear to see us perish in our sins; he longed to share with us his everlasting life.
He cares. God cares. And Jesus Christ is the definitive proof that he cares.