God is personal, If you believe in a loving, caring God you are a better person for it. If you believe in a church or group you already missed the boat for they can lead you to a path that is not one you want to be, that is, completely opposite from my opening statement.

if you have a personal belief in God, no explanation is possible or necessary ... There is no need for anyone to try to convince others, that path they find or don't themselves. Free will is the issue. People can and should find their own path without trying to force others into a box (believers or non believers both) I would never try to "convert" another person ... to me that is one of the worst things a person should do ... Walking the walk is much harder than talking the talk ... I think ... atheist or Christian or any other religion ...
the one thing from God as anyone sees it ... is "What have you done to make this world a better place for others"   It is not the toys and how many we acquire ... it is how many hearts hold us dear that makes a difference in this life