Agnostic theist is a bit of a contradiction.
To that I give you Madeline L'Engle:
"At a church conference recently someone asked, "You have referred to your agnostic period. What happened to get you out of it?" and I replied joyfully, that I am still an agnostic, but then I was an unhappy one, seeking finite answers, and now I am a happy one, rejoicing in paradox. Agnostic means only that we do not know, and we finite creatures cannot know, in any intellectual or ultimate way, the infinite Lord, the undivided Trinity, Now I am able to accept my not knowing--and yet, in a completely different way, in the old biblical way, I also know what I do not understand, and that is what my agnosticism means to me. It does not mean that I do not believe; it is an acceptance that I am created, that I am asked to bear the light, knowing that this is the most wonderful of all vocations."