To deny the existence of God, or a Higher Power if you prefer, is to deny you are the beneficiary of acts done on your behalf. To think you are not part of the One is stroking your ego. You are refusing to believe others – who are all part of the One – had a huge part in your good fortune, and contributed to your present state through a force greater than you alone.
Accept this truth and be grateful for what you have and who has given to you. Others may have more than you, but you have much to appreciate when you think about it. Don’t give credit only to yourself for that, just as you don’t credit yourself for not being born and left to die as an infant in an impoverished area of the third world.