Is heaven for real even though you can't see it?
Do you see the wind blowing? No. But you know that the air is there, you feel it when our hair moves as the rhythm of clasical music drifting throughout the air.
So you know that God is there, even though you can't see him. He is on the first light of a new day, on the falling leaves, on the joyfull laugh of a little kid. You've got to believe, even on the things you can't quite see, because even though you don't see, you know they're there. He's there.