The belief that whether there is or is not a God is irrelevant. Irrelevantism is not a religion, it is an ideological philosophy which states that God, if he does exist, will be pleased that people live and enjoy their lives--which are precious gifts from God--instead of devoting all of their time to man-made religions, which worship humans more than God. However, if there is not a God, then it is all moot. Irrelevantism generally offers religious neutrality.
He believed in the philosophy of Irrelevantism.
Irrelevantism allows one to be free from the burdens of religion to focus on more pressing, everyday matters.