The Doctrine of the Trinity

 where I got this image

This is a very complicated topic, I admit, however in my reading of Henry Morris's book "The Biblical Basis for Modern Science" he touches on this subject, and for me it is an awesome experience to read what he has to share about it. I will share an excerpt that I hope will teach as well as grow a hunger in you for The Word, and maybe even a desire to read this great book in its entirety as well.

Excerpt from the book:

How, then, can God be a Trinity? To understand this, one must remember that this doctrine does not mean three gods. "Three gods" is as impossible and false a concept as any other form of polytheism. There can be only one God, and He is the great First Cause, the author of all reality.

But if God exists only in His ineffable unity, He could never be truly known. He is fundamentally the eternal, omnipresent, transcendent God, the great First Cause, the source of all being. Being present everywhere, however, He could never be seen or heard or sensed anywhere. Yet since He could not be frivolous in His creation, He must have a purpose therein and that purpose must be communicable. He must therefore somehow be seen and heard. He must be a God who is both infinite and yet finite, who is omnipresent and eternal and still comprehensible locally and temporally. He must paradoxically be both source and manifestation, both Father and Son.

Not only must the invisible and inaudible God be seen and heard objectively, however, He must also be experienced and understood subjectively. The life of the creation must be maintained in vital union with that of the Creator. The Spirit of God must move over the creation and must indwell it and empower it. The activity of the Spirit is distinct from that of the Son and from that of the Father, and yet is indissolubly one with both.

God, therefore, is one God, and yet He must be Father, Son, and Spirit. God is Father in generation (*causing everything) Son in declaration (*spoken Word made visible) Spirit in appropriation (*in us and through us and to us). The Son is the only begotten of the Father, and the Spirit is eternally the bestower of both the Father and the Son.  
The Biblical Basis for Modern Science Copyright 1984 by Henry Morris, fifth printing 1987; page 58

* I added further clarification, I hope, in italics and parentheses where I placed the asterisks.