C.S. Lewis wrote..

I am halfway thru the apostle paul and even though i promised myself i would not pick up another book until that one was finished it was virtually impossible to do. I have found myself at the chapel down on bended knee every single day praying for understanding of the wisdom i seek.  Anyway I checked out 2 books from c.s. lewis mere christianity and the joyful christian. i found a reading entitled the trinity. i read it last night and then a little while ago and something about it makes sense. i have of course trimmed it from 8 paragraphs into what follows: 
The trinity ...God is a being which contains three persons while remaining one being. But as soon as i began trying to explain how these persons are connected , i have to use words which make it sound as if one of them was there before the others. the first person is called the father and the second the son. we say the first begets or produces the second; we call it begetting, not making, because what he produces is of the same kind as himself. in that way the word father is the only word to use. but unfortunately it suggests that he is there first- just as a human father exists before his son. but that is not so. there is no before and after about it. and that is why i have spent some time trying to make clear how one thing can be the source, or origin, of another without being there before it. the son exists because the father exists, but there never was a time before the father produced the son. if there were a being who had always existed and had always been imagining one thing, his act would always have been producing a mental picture; but the picture would be just as eternal as the act. in the same way we must think of the son always, so to speak, streaming forth from the father, like light from a lamp, or heat from a fire, or thoughts from a mind. he is the self expression of the father-what the father has to say. and there never was a time when he was not saying it.but have you noticed what is happening? all these pictures of light or heat are making it sound as if the father and son were two things instead of two persons. naturally god knows how to describe himself much better than we know how to describe him. he knows that father and son is more like the relation between the first and second persons than anything else we can think of. much the most important thing to know is that it is a relation of love. the father delights in his son and the son looks up to his father.. the union between father and son is such a live concrete thing that this union itself is also a person. of course it is not a real person it is only rather like a person. but that is just one of the differences between god and us. what grows out of the joint life of the father and son is a real person is in fact the third of the three persons who are god. this third person is called in technical language the holy ghost or the spirit of god. perhaps some people might find it easier to begin with the third person and work backward. god is love and that love works through men especially through the whole community of christians. but this spirit of love is, from all eternity, a love going on between the father and son.