Well, I once was an athiest, a natural outcome from early Catholic religious training. This due to the overly punitive god and lesser gods that I was supposed to put my faith into. Then later, agnostic as I learned more about philosophy and the various ways of approaching spirituality. Later still, after a number of years seeking through nature, travel by motorcycle, and some shamanistic experiences, a theist of sorts. But I have no theology or dogma.
What is consciousness? Here I head toward Buddhist thinking that we are little chunks of a bigger consciousness, or as Emerson put it, an Oversoul. Also, these little hunks of big consciousness link together into a web, and this web can be tapped given enough concentration, awareness, and practice. The third eye can open and we can see.
But that carries great burdens, so most of us, including myself, shut down if we get too far into the web.
I don't accept the idea that our consciousnesses are separate from the other spirits around us, either. Now that heads into Native American and ancient human thought that all things are alive--all things have spirit. Yes, we must kill to live, and sometimes we must kill to protect. Yet we never leave the circle: We too will be killed and become food for somethings else.
When I contemplate death, the soul who talks most convincingly to me is my father, who passed on in the mid-1970s. I suspect we create our own afterlife realities, just as we can create our own realities in the physical world. My mother, a staunch Catholic, found her heaven. My father, a freethinker, became a guiding angel.
Biology contradicts physics because it does not have entropy. Why do single cells join together into more complex organisms? Why is there even life at all?
Obviously, life must be built into the physics, else it would not exist.
Matter and energy, both of which can be neither created nor destroyed, are not good vessels for the spirit. Living things are good vessels. The more complex the living thing, the greater the spirit who can take the vessel. And so, biology becomes more complex over time, whereas other physical systems denegrate toward an unorganized state--entropy.
Is there a Big Plan, a Loving God, a Savior?
Sure, if you want it that way.
So, since neither matter nor energy can be created or destroyed (but may shift dimensions at quantum levels), I think the same goes for spirit. As an athiest, I believed that my consciousness would just blink out after physical death. Now I think it goes on, carries with it some of the things learned this time around, takes a vacation in spirit land, and comes back to raise some more ruckuss on earth or some other life-bearing planet, possibly in some other dimension.
But this is hard stuff to see within the vessel. The vessel itself carries burdens of illusion, and the more complex the vessel, the more complex the illusions. In addition, the physical circles blend with the spiritual in subtle, and sometimes not so subtle (think orgasm here), ways. Sure, chemicals can be manipulated in the brain to bring sensations and create distorted illusions--but think about natural highs, as when something really sweet happens in your life. Are your feelings just the result of chemical and electrical cues and impulses?
I suppose, if you want it that way

Which, of course, heads into ideas about will--but I'm done with this thought. Have to do other things today