That's true! But, don't you think that our inner state can be correctly described in terms of electrochemical activities inside the brain, including spirituality?
In the same way that the current state of a computer can be described by the position of electrons within its components or a party can be described by the relative position and density of various types of atoms in the room, sure.
I believe the electrostuff in the brain is determinstic, but we exist in a parallel dimension which is able to bias the movement of any of those interactions. Picture the brain as a pinball game, and we're able to "tilt" the table to influence it to some extent to go in a direction we want, but only in a very limited way :)