We don't talk much about how narrow and operationally weird the notion of falsification is. It seems like pop philosophy that takes the idea to be the pinnacle of scientific endeavour
The requirement that a hypothesis be falsifiable is to filter out the metaphysical 'not-even-wrong' claims. It requires that we limit our claims to those that can manifest empirically. Thus, claims about prayer working are scientific (falsifiable) because they are testable, and if wrong, can be demonstrated to be wrong, whereas claims about heaven are metaphysical claims that cannot be said to be correct or incorrect, hence, not-even-wrong. If a claim about reality is not expected to manifest as evidence even in principle, then it cannot be called scientific, it is unfalsifiable, and it can be disregarded.
deducing the image of God in man would dispel the belief that man is solely a secular being.
If one tries to guess what a deity is like looking at mankind, then that is literally making that god in man's image.
man is clearly a spiritual being
The word spiritual probably means something different to you than me. Spirituality has nothing to do with spirits and everything to do with a psychological response to life and the world in which one experiences a sense of connection to nature manifest as a warm feeling, a sense of awe and mystery, and often, a sense of gratitude. This is frequently mistaken as a message from some external agent. There are several examples from history.
The ancient Greeks did this with the muses. They didn't have a concept for the mind being creative. Creative inspiration was not understood as a product of the mind, but rather, as a received message from a creative muse whispering silently into one's brain.
Likewise with dreams, who most understand to be products of their own minds, but others mistake as messages being delivered to them.
And likewise with internal moral conflicts, which are often depicted as a devil and an angel sitting on one's shoulder and arguing through one's ears.
These are all examples of people confusing thoughts originating in their mind as evidence of some external agent communicating with them. This is the same with the spiritual intuition, except that many have not discovered that their apprehensions that they call God or spirits are endogenous psychological states.
which is why there are countless religions, worship centers, religious edifices, shrines, altars, temples
Those exist because many people understand the spiritual experience as implying the existence of spirits. They are mistaking the products of their own minds for the experience of external agents. They are not evidence that man is not another animal that also evolved from the same original ancestral population, and they are not evidence for a deity or anything else outside of imagination.
that spirit must have had a source, for it did not come from stardust or protoplasm.
There is no spirit, just an intuition, and its source is the brain.
Would the judgement of an atheist be accepted with regards to spiritual matters when he has no knowledge whatsoever of such matters even denying God exists?
For me, it's the other way around. Why should a theist's unexamined judgment about the significance of his inner life be trusted. Supernaturalism distracts from authentic spirituality, which is rooted in an experience of connection with nature. The theist is preoccupied with imagined agents and realms, and therefore doesn't have the same connection to nature as the naturalist.
When I was a Christian, we were taught that matter was a base substance, that the universe was a passing phase slated for destruction, that there was a purer, better, supernatural realm upon which our gaze was to be firmly set. The world was described as a place to not be a part of. Like "the world," "the flesh" was deemed inferior to the spirit trapped inside it for now. Man is completely alienated from his world with this vision of it.
But that religion wasn't done. It also taught that one's own mind was the enemy, that doubt and cognitive dissonance were sin and the voice of a demon trying to steal one's soul to hell. People often lived life as if at a bus top, waiting to be shuttled off to someplace else, somewhere better than the world. Can one imagine more violence done to the spiritual experience as I have described it?
Yet here you are wondering what an atheist can have to offer in matters of spirituality. How about a definition of an authentic spiritual experience, where it comes from, and what it means? What does a theist add to that but spirits, which, as I explained, detracts from the spiritual experience and deflects it to thoughts about spirits and their realms.
My wife is a spiritual woman and an ardent gardener, where she spends time with the soil, the worms, the birds and butterflies, and thoughts of roots, growth, sunlight, and mother earth. If she were a Christian, she'd probably be thinking of God and heaven or something similar instead of her garden.
The way you falsify evolution is to point out the fact the theory does not start at the beginnings of life; abiogenesis.
The fact that the theory of biological evolution begins after the completion of evolution to the first living cell population - chemical evolution - does not falsify it, since it does not demonstrate it to be incorrect.
t is good that religion did not cave to the politics of hard baked and kept the discussion open, so the theory can evolve away from the limits of casino science; ignores the past. Nature evolved proof reader enzymes to make life and replicators more deterministic, as religions have always assumed.
The religion I belonged to wasn't very deterministic. It taught that man has free will and that miracles were possible.
The religions have no input into the sciences including evolutionary science, and there is no discussion between the scientific community and the religions or anybody else. Creationists may claim that the debate continues, but not with the scientific community.
And if you think that the theory of evolution is casino science, your understanding is incomplete. The random element is only part of the theory, and manifests in genetic variation. Natural selection is directed, not random.