I’m a new member and I read this thread in entirety over this weekend. (Is there a badge for this?

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My response is that it is the same God, no matter what the believers want to think. My related question is whether the Holy Spirit is the same as the Voice of God? As kind of an outsider, without a dog in the fight, reading about the two, they sound rather similar.
They are kind of the same thing. My understanding, and others may have a different one, but from my understanding and experience, the Holy Spirit is that which communicates with you to facilitate your growth. You have guardian angels which do this as well. The Holy Spirit brings you comfort, directs your spiritual growth, it is the God spark within you. To put it in more concrete terms is really hard as our human brains can’t really hold the concept as it really is within the world. At least mine can’t at this point. But, I don’t think being able to put it into words is important. It is felt knowledge, if that makes sense.
I will give you an example. If you get really, really down from life’s challenges, and get on your knees and ask God to help you, don’t just ask to have the situation changed or to be guided out of it, ask for the strength to go on, ask for understanding of what the challenge means to your development, ask for the broken heart to recede and for understanding to take its place with the ability to move on complete and whole. Well, you know the saying “peace that surpasses all understanding”? When it is time in God’s mind, this peace will settle over you.
You wont just feel peace, you will feel joy and love and at complete rest and in love with the world. This feeling is the work of the Holy Spirit. It comes suddenly and quietly and illuminates your mind and heart. It will give you an awareness of who you are in the mind of God. It will teach you as it brings you peace. This is the natural state of man when he/she is in touch with God. It is what is meant by “putting on the mind of Christ”.
This is what he meant when he said “I am the Truth and the Light”. Part of the reason for his life being sacrificed was so that they we may, through the Holy Spirit, find our way to living in this peace. He said that he had to die in order for the comforter to come.
Quite truthfully, the Holy Spirit is within all us, believers and non-believers. I am not sure if you even have to believe in its being there to “discover” it. For some people it will just come over them and they find it in this way. I think, though, that being a Christian helps gain access as you know in your heart that it will come. However, belief in terms of knowing Scripture is not enough. You have to have heart knowledge. If someone has heart knowledge of God, is in love with God, they have an awareness of their connection to God and so the Holy Spirit is alive in them.
To tell the truth, some believe the Romans stopped killing Christians because they observed this state of joy in Christians about to be put to death for their beliefs and wanted to experience that joy for themselves. Then again, when Constantine converted, that was that for the persecutions in Rome. It may have been both. I got a bit off subject, but I wanted to illustrate that it is a pretty powerful experience.
I think, but can’t say for sure, that Jews and Muslims have a concept of this state but call it or think of it in different terms. I say this because both use the greeting “Shalom” which means peace be with you. I could be wrong. But, it is in all of us. I think the Buddhist call it Nirvana. Christians take it a step further and identify its source as being God, which it is. It is our job to continually develop it in our awareness as we go through life–as we do so, we learn to fall in love with all men and with the gift of life itself with all of its pains and joys. The challenges are what take us there. Francis Chan has a book out about it called “The Forgotten God”. It doesn’t set up the Holy Spirit as a separate God as the title suggests. It is more like the forgotten aspect of God as it is not really discussed in sermons and so folks don’t understand it. I think of the Holy Spirit as being like a very supportive coach.