Perhaps a major division between atheists and theists is atheists think God simply did not make himself evident enough for them.
And it seems the major division between loving Christians and less loving ones is the latter's thinking that God simply does not love us enough.
“I seem incapable of love, Father Joe” said Tony Hendra to Fr. Joe Warrilow in his memoir Father Joe.
“Tony dear, you will only be able to love when you understand how much you are loved," Fr. Joe responded.