Trinity

I found this interesting encyclopedia article on the trinity, which had some very interesting quotes:

Thus we find God saying in Genesis 1:26, "Let us make man in our image". It should be noted however that Jews do not see the word "us" here as denoting plurality of persons within the Godhead, rather it is a plural of respect. Hebrew and Arabic both have plurals of respect, where God speaks of Himself in the plural.

See there! No way could you convince a Hebrew scholar that that scripture is referring to more than one person.

Criticism of the doctrine includes the argument its "mystery" is essentially an inherent irrationality, where the persons of God are claimed to share completely a single divine substance, the "being of God", and yet not partake of each others' identity.

You're telling me it's irrational!

Critics also argue the doctrine, for a teaching described as fundamental, lacks direct scriptural support, and even some proponents of the doctrine acknowledge such direct or formal support is lacking. The New Catholic Encyclopedia, for example, says, "The doctrine of the Holy Trinity is not taught in the Old Testament", and The Columbia Electronic Encyclopedia adds, "The doctrine is not explicitly taught in the New Testament", although these sources contend the doctrine is implicit.

And there you have it folks. The doctrine of the trinity is not supported by the Bible. But don't take my word for it; find out for yourself.