One of the things that makes Christians stand out is that we don't just talk about God or ask questions about whether he exists or not; we also talk to God. God is not another object out there in the Universe for us to discover, and then move on to greater things.
God’s existence isn’t like the existence of aliens, maybe out there but so far away it’s not worth worrying about. Coming into contact with God is all about discovering the relationship at the centre of everything: the relationship that makes me who I am.
Christians believe that the relationship at the centre of everything is that of a child to its Father. This relationship is at the very centre of God’s life: God is the love of the Father for the Son, and the Son for the Father, and this love between them is the life of the Holy Spirit.
So the God we find ourselves in relationship with through Jesus is not a lonely old man, or an absentee landlord: he is the eternal undying love of the Trinity. He is the Father of Jesus, and through Jesus the Son, in the Holy Spirit, is Father to us who in baptism become his children.