The more man puts into God, the less he retains in himself. – Karl Marx
This is actually more profound than it might first appear.
I will not deny that the God idea has some benefits, but it also has some downfalls. The first is the shifting of responsibility. We can always blame God for the evil we do, either by commanding us to do it or by not helping us not do it.
God commanded Isreal to “kill both man and woman, child and infant” (1 Samuel 15:2-3). You can justify any atrocity in the name of God. History provides more than enough proof of this.
But God also depletes what little strength you have to stop doing wrong and start doing good. We are powerless and helpless, we are told. We need God to strengthen us in order to live right. Original sin this is called. It is a horrible error.
But when the illusion of a personal God is gone all of us become accountable, all of us are responsible. You can’t blame your bad deeds on God. There is no God. There is you and you are to blame.
But we fail. Yes, but we are responsible and therefore we can fix it. If we are not responsible, then we become helpless victims. Then we are without hope, help, or any future.