Science concerned with things which exist
Religion concerned with things it has created which don't exist/no proof of
Science begins with a theory from which we formulate a general hypothesis.
Then we work our way to specific hypotheses and break them down to objectives that can be assessed. We experiment with the objectives and based on the results we reevaluate our objectives. This is a circular process which is either validated and repetitive or not. If it is, we go back and reevaluate our specific hypotheses, to see if the objectives prove or disprove it.
The most important basis we start with is to try and disprove our hypothesis.
i.e. we start with the basic premise that it will not work. So we design all our experiments to make sure that using all possible tools, knowledge, and abilities to make sure it does not work. If it works, that is an aberration to be explored because it means we have some new knowledge. But the null hypothesis is always equal to zero.
But what happens sometimes is that it works and we believe we have new knowledge, but its possible that we simply do not have enough information about that particular system to apply the right tools or abilities, so we got a false positive. Similarly, if we discard an aberrant result that does not validate our objective or hypothesis, we may lose an important piece of information and get a false negative. A false positive is easy to recover, because with continued increase in knowledge, tools and ability, we will one day run across the missing piece of information which will bring us back on track. But a false negative, once discarded is rarely re-considered and represents a hole in the knowledge which may be recovered only by someone who does not discard it even though it does not validate or prove his objective.
i.e. a false negative is as important as a false positive because it may lead to the development of alternate hypotheses which prove/disprove your original theory.
In short, science is a process governed not only by knowledge but by adductive reasoning and intuition. (also luck and in quite a few cases, by risks taken by the investigator)
i.e in the beginning every scientific theory begins with something that does not exist (null=zero)
Things which can be said to exist without proof = infinite
Odds of guessing correctly = zero
Not infinite, actually and limited only by the desire, ability and knowledge to gain them. Not all of them in our lifetimes and perhaps not completely ever, but surely and slowly, regardless.
Heaven, prayer, soul, spirit, hell, god, afterlife... All guesses...
If you are limited by the concepts presented to you. Remember, people have a tendency to redefine concepts so as to make them more comfortable and acceptable and easy to recognise. It is not enough to have God, it is necessary to have an image of God, when you start there, you move to a House of God, a ritual to recognise and adore God etc. In short, concepts have a way of changing shape over generations. But you need not be limited by them.
Maybe... but that only means I don't know what it is like to be truely delusional.
What is your idea of a spiritual experience? Do you expect a vision or a "voice"?
That would be difficult to rationalise.
Does God really love me? Does he? It almost makes me want to believe
Again you are limited by concepts; you expect Michaelangelo's God holding out his finger to you.