I take it that you perceive homosexuality to be a "spiritual issue"?
Yes, I do.
And murder? Is it a spiritual issue also? Or is it amoral?
Murder, in the sense God looks at it, is a spiritual issue. It is impossible for human legislation to curtail it. Only a transformed nature will do the trick.
Ending another person's life, OTOH, can and should be prevented by human legislation.
And stealing? Is is a spiritual issue?
Taking someone else's property is very much a physical issue. But coveting it in the first place is the root spiritual issue. Fix the root, and the fruit will be good also.
And how about adultery? Is it a spiritual issue?
Oh, yes. It's a spiritual issue that would lead to rampant persecution should humans try to legislate it.
Can you imagine what would happen if we made it illegal to look at a woman lustfully? Who is going to police this illegal activity? How would a judge determine guilt or innocence?
Of course, man can legislate what kind of sexual activity is or is not allowed. But that doesn't even begin to scratch what adultery means.
And divorce?
Sure, man can legislate that. But then, such legislation would have little or no effect on improving the godliness of marriages.
You have quite a selection to choose from? Which will you call "spiritual" and thus disallow for legislation? No human laws for any of these "spiritual issues"?
Yes, the selection is huge. But I have a simple rule to distinguish between what man can legislate, and what should be left alone:
If what I do impacts another person, then the govt can legislate it; if it happens within the recesses of my thoughts and feelings, leave it to God.For the former, the state should enforce it; for the latter, the church should work toward transforming the lost souls within its reach. If we keep their spheres of authority clear, distinct, and separate, we should be fine. But if one entity crosses the line to the other side's sphere, regardless of which entity does the crossing, the wall is broken down and the fires of persecution will be kindled.
In short, if we look to the state to enforce God's law, we're barking up the wrong tree.