Regarding the trinity, what do you make of the "us" & the "our" in Genesis 1:26 Then God said, "Let us make man in our image, in our likeness,..."
Now even though I might poke holes in the trinity doctrine I don't deny the reality of God's spirit or of his word. In the Genesis account God's spirit is stated as hovering (brooding) over the surface of the deep while the very power of his word went forth to do what he spoke into existence. The real question is, do we need a doctrine to make God understood by our intellect in order to fathom his depths? :) In the same manner, do I need to explain myself as a tri-part being just because I might often say to myself, "Okay Jim, let's do this thing."?
Interestingly on that last note, many have determined that this is what it meant to be created in the image of God. For since as it is reasoned that God's image was in three persons, man was also made up of three parts: body, soul and spirit ... or is that mind, emotions and will, etc? :) Not that any of those things are not part of our makeup, but it's funny we should overlook the most obvious and simple reality that man was made as a reflection of God in the physical world. Instead, we get technical and theoretical (i.e. doctrinal).
Now consider, as God is not limited by space he is everywhere, so that as God's spirit hovering over the earth or his word going out from him neither were in any way separated from him. And yet his spirit did the brooding while his word performed his desire. Also consider that God did not "speak" in English ... nor in any "language" of man. And though we might find it impossible for there to be a "word" emitted from the mouth of God without the trappings of our verbalizations the truth is that he expressed his desires perfectly! :)
I suspect the specific wording in the statement, "Let us make man in our image, in our likeness" especially reveals the full being of God as connected to the creation of man along with the reality that man was made to be the very expression of his being.