Joy is there everywhere; it is superfluous, unnecessary; nay, it very often contradicts the most peremptory behests of necessity. It exists to show that the bonds of law can only be explained by love; they are like body and soul. Joy is the realisation of the truth of oneness, the oneness of our soul with the world and of the world-soul with the supreme lover.
Our self (Soul) is maya (an illusion) where it is merely individual and finite, where it considers its separateness as absolute; it is satyam (truth) where it recognizes its essence in the universal and infinite, in the Supreme Self, in paramatman (God). This is what Christ means when he says, "Before Abraham was, I am" (i.e. before Abraham was God, who is the same that is in my soul - I am That.)
If the world had two gods, it would surely go to ruin-this is the first premise. Now it is known that it has not gone to ruin-this is the second premise. From these premises the conclusion must of necessity follow, that is, the denial of two gods.