The concept of a trinity is fine with me....for this reason: We live in a physical world of 3 dimensions. I think that has much to do with religious notions of the trinity, which again is symbolic. A static object (like a stool or an airplane, for example) needs at least 3 legs to stand on. A family is a trinity: mother, father, child. Material things exist in a trinity: solids, liquids, gases. Is it at all surprising, given these things, that people would theorize a triune aspect to God as God relates to Creation? Not to me it isn't.

All numbers have significance in sacred traditions. If you posit the idea of God at all...then you are assuming that everthing derives from God, including numbers. You begin with "1"...a seamless unity (before the Big Bang?). The one divides itself into "2", and you have light and darkness...which means you can now see opposites! Major occurrence! The light and darkness interact, and you have progeny....(that is, physical things come into existence)...and there you have your worlds of 3 dimensions.

That's one way of interpreting it.

The ancient Hebrews had the odd idea of taking the trinity (Father, Mother, Child) and officially editing out the female portion and turning it instead into an indeterminate, genderless thing called the "Holy Spirit"! Heh! They must have been VERY patriarchal indeed. I think they went astray there with their symbology. God, to be God at all, must combine the masculine and feminine aspects in an equal fashion.

My opinion, again... ;-)