When discussing our Spiritual side, it is easy to get distracted by metaphysics and the philosophical side of things: questions like 'does God really exist?' and such. Now philosophy and childlike wonder have their place, but when we are out and about, getting on with our lives, interacting with others, what matters with regards to our Faith is the thoughts, words, and deeds that it generates, rather than naive questions of 'is it true?'.
For the most part, the answers to the 'is it true?' style questions, if such answers can even be reached, depends sensitively and in a complex way upon what meanings we give to words like 'God' and 'Spirit', and what initial assumptions we give ourselves, and what patterns of reasoning we permit ourselves to use. Essentially the answers we seek become swamped by this.
So when it comes to daily life, when we are out and about, I feel it best to put such metaphysical matters aside, and think solely in terms of what I call our Daily Driving Faith: those beliefs we hold by default, and which we adhere to when we are out and about.
In private I happily explore may possible foundational assumptions: some theistic, some atheistic, some materialist, some very non-materialist. I enjoy seeing where things lead from these different mindsets, and also enjoy finding things which hold across may disparate belief systems, even though the reasoning that leads to them may be very different. As such this phenomena of reaching the same result from different starting points leads to a level of abstraction.
To give an example of this, consider Jesus commandment to 'Love Our Neighbour'. If we start with a Buddhist mindset, we are likely to have little difficulty reaching the conclusion that we should 'Love Our Neighbour' in a similar way assuming only the correctness of the Buddha's teachings (the Buddhist would likely use words like compassion and lovingkindness, but the take-home so far as treating others is concerned is the same). If we start from genuine Humanist foundations, (as opposed to an anti-religious person using the 'Humanist' label to self-justify their anti-reigious sentiments), we can reach the conclusion that we should 'Love Our Neighbour' too. As such, then, 'Love Your Neighbour' should be a common feature of any acceptable belief system: if it doesn't enjoin us to Love Neighbour, then don't adopt such a belief system. Then, whatever beliefs you grant yourself to start from, seeking justification for Love Neighbour should be a priority. Whether you have a God Concept in your belief system is a separate matter: Christians have theirs, Buddhists largely do without, but both preach the message of Love Of Neighbour, no matter how far from that one's lifestyle has fallen.