You seriously think I haven't heard this kind of explanation? This is nearly as pathetic of an explanation as the three states of water. At the end of the day it's another religious platitude used to justify calling their religion a monotheistic belief. If you knew a little history about the Christian faith you would know that early Christians often had altercations with the polytheistic Romans (pre-63 AD [afterwards Nero fucked their shit up]) and to separate themselves from these "idol-worshipers" they bolstered this notion of the trinity that was already floating around in other sects.