I reply as someone who is deeply sensitized and averse to any specific religion, but also as someone who has found some relief in spirituality and prayer. Quite a few of the replies presumed that your shrink was presenting a Christian point of view. While that may be the case, I didn't get that from your OP.

I have found the language of letting go and and letting god to be a useful way to think about radical acceptance. Likewise, I have found the practice of prayer to be a helpful tool in reorienting my attitudes toward that acceptance. I don't feel, most of the time, that I'm praying to anyone and when I do, it's something or someone I carry very little dogma regarding. So maybe your Dr. was talking about spirituality in this general way.

If that still makes you uncomfortable, then, since you have seemed to click, you could ask him to address your concerns in terms of acceptance rather than spirituality. If he doesn't amend his ways, probably time to move on.