Globalnomad said:
arunma, can you give a shot at as good a description of the Trinity as you gave of the Word of God, or shall I try?
I would very much welcome your description of the Trinity. But I can also give it my best shot.
I think the best understanding of the Trinity comes from Bishop Saint Athanasius of Alexandria, and his Athanasian Creed. We cannot fully understand the Trinity, but we can say what it is, and what it isn't. As he says, "And the catholic faith is this: That we worship one God in Trinity, and Trinity in Unity."
The Trinity is three Persons, not one Person who fulfills three distinct roles. But in three Persons we have but one God. The Father, Son, and Holy Spirit are all without beginning and end, but the Father begat the Son in eternity. Furthermore, it is important to note that all three Persons of the Trinity are of the same substance, but they are still distinct. About Jesus the Scripture says:
I will tell of the decree: The LORD said to me, "You are my Son; today I have begotten you. Ask of me, and I will make the nations your heritage, and the ends of the earth your possession. You shall break them with a rod of iron and dash them in pieces like a potter's vessel." (Psalms 2:7-9)
I think one of the best examples of all three Persons of the Trinity at work is creation, in which it says:
In the beginning, God created the heavens and the earth. The earth was without form and void, and darkness was over the face of the deep. And the Spirit of God was hovering over the face of the waters. And God said, "Let there be light," and there was light. (Genesis 1:1-3)
Here we see the Father, the Voice of God (who is Jesus), and the Spirit. Another revelation of the Trinity is at the baptism of Christ:
And when Jesus was baptized, immediately he went up from the water, and behold, the heavens were opened to him, and he saw the Spirit of God descending like a dove and coming to rest on him; and behold, a voice from heaven said, "This is my beloved Son, with whom I am well pleased." (St. Matthew 3:16-17)
Here, all three Persons of the Trinity are again at work. We can thus see that they fulfill distinct roles, but are one in substance, will, and purpose.
Of course, the Trinity is a rather deep subject of Christianity, and I would not presume to write an entire treatise in a single post.