Let us look at monotheism from the point of view of revealed knowledge. When we make a survey of revealed scriptures, the first question that arises is which one of them is to be regarded as authentic? Apparently, in the world of today, there are many religious books, which are said by their adherents to enshrine God’s revelations. But when these books are judged on the basis of history, we find that none of them can sustain their credibility on purely historical grounds. We have no way of knowing, as a matter of historical record, precisely when and how these books came into existence, what their original language was, how they were preserved after the First Giver, how they reached later generations of followers — all these questions remain unanswered. These books are thus believed, by their adherents, to be Holy Scriptures, without their having any historical proof of this.

In this non-historical museum of “revealed” scriptures, the Qur’an is the only divine book, which comes up to the standard of history in every respect. The Qur’an has every kind of historical credibility and authenticity, so that one may believe in it with full confidence.

This means that if an individual wants to find out the concept of God, according to revealed knowledge, he can trust only the Qur’an to be the authentic source. It is a fact that, the Qur’an is the only existing divine scripture, which provides a reliable source of learning the true concept of God.

When we refer to the Qur’an on this subject, we find that, according to revealed knowledge, there is only one true concept of God, and that is pure monotheism. That is, God is only one. He has no partner, no equal. He is eternal and beyond time and space. He alone is the Creator and Sustainer of all things. (2:255)

So far as the concept of three gods, or the trinity, is concerned, it is highly illogical in every respect. It is not proved by any revealed source. Even today it is merely a creed of the Christian Church. In neither the Old Testament or the New Testament, held sacred by Christians, is there any clear mention of the concept of the trinity. In their own sacred scriptures the trinity is an alien creed.

So far as reason then is concerned, the concept of the trinity is not rationally understandable. In terms of the trinity, God is at the same time “three in one” and “one in three”. This is an inconceivable mathematical riddle, which none of the greatest of mathematicians can solve. That is why when a Christian professor of an Indian university was once asked by a student to explain the trinity, he had this to say:

“If you ask me I do not know, if you do not ask me I know.”

The truth is that the concept of the trinity is wholly unproved so far as religious scriptures are concerned. It is likewise entirely baseless judging by the criteria of knowledge and reason. Keeping this reality in view, it will not be wrong to say that this concept is so unfounded that, prima facie, it stands rejected.