If you do not believe in god , have faith in your self and say to yourself thus:

"This body continually accumulates filth and gets dirt every day .I am certainly not this filthy body. I am the ever-pure Atman".

"This body gets worn out every day.I am certainly not this body that decays with time. I am the ever- fresh Atman."

"This bidy gets emaciated if not fed regularly.I am certainly not this food -dependant body.I am the ever strong ever enthusiastic ,omnipotent Atman."

"This body will one day get burnt in a funeral pyre in full public view.Iam certainly not this miserable body that is going to be reduced to ashes.I am the eternal Atman, ever pure and ever illumined."

If you can develop this sort of an attitude ,it is in no way inferiour to any prayer.

-Swami Purushottamananda-.