Currently, I believe that feeling the spirit is feeling God/love, nothing more, nothing less.
When we add to this, by interpreting it to mean, "I need to go 3 blocks, knock on the door and give $500 and big smackeroo" etc., - I think we miss the mark.
Still, life progresses by trial and error - so we'll learn more the more we try, even if we miss the mark.
And I think feeling the spirit greatly depends on gratitude, as well as striving/progress.
How can you differentiate between a feeling that is God and a feeling that is self generated?
Sorry for the delay in response, Bazooka. I think Subgenius gave a good explanation.
Your question requires clarification, some of which I can expand on and some which I can't yet.
God is always experienced within, as everything we experience, right?
"The kingdom (realm/experience) of God is within you." - Luke 17:21
And the only way God could be omnipresent and omniscient, is to be able to be within all - "Split wood, I am there. Lift up a rock, you will find me there." (-Gospel of Thomas)
Spiritually, I think there is a direct connection with all - but with the "veil" (subjective/illusional awareness) it's not so clear.
As human beings, this is our state - yet how our experience of God is after we depart our bodies, is something I'm unsure of, but there are little clues in NDEs (Near Death Experiences) and personal spiritual experiences.
All that we experience, is filtered through us - through our minds and bodies.
How we filter it affects the type of sensations we have.
Consider that we only use a tiny percentage of our brain - we have so much potential!
Consider how much of what influences us is subconscious - and consider the power of belief - whether logical or not (placebo effect).
Consider that the brain has specific areas for many experiences (language, motor skills, etc.) - but there is no specific area where emotions are concentrated - but they are experienced throughout the body, as if every cell of our bodies were e-motionally responsive.
Essentially, all we experience is self-generated, but there are many different aspects or approaches to our creativity. There's a higher self (spirit/subconscious) - and lower self (carnal/ego). Each of us have unique degrees of emotional intelligence/intrapersonal intelligence.
So, I think the way to know if something is coming from our higher, rather than lower selves, is to use common sense to see if it make sense morally and then experiment by trial and error - active faith. Little by little, we get to know ourselves more (psych-ology/study of the soul) and learn when intuitive/spiritual experiences are interpreted by our fears or carnal desires - of if there's higher wisdom within.
This is my understanding now - and I hope to learn more.