Atheism with its lack of a governing principle involves disorder. Polytheism, with a plurality of such principles, involves faction and hence the absence of a governing principle, and this involves disorder again. Both lead to an identical result - lack of order, which, in turn, leads to disintegration, disorder being the prelude to disintegration. Monotheism, with its single governing principle, is what we value - not monotheism defined as the sovereignty of a single person (after all, self-discordant unity can become a plurality) but the single rule produced by equality of nature, harmony of will, identity of action, and the convergence towards their source of what springs from unity - none of which is possible in the case of created nature. The result is that though there is numerical distinction, there is no division in the substance. For this reason, a one eternally changes to a two and stops at three - meaning the Father, the Son, and the Holy Spirit.
quoted from:
http://theodorakis.net/orthodoxquotescomplete.html
