The Creeds focus us on mystery within the context of the revelation of God in Jesus Christ through the Holy Spirit. There is plenty of mystery and much escapes our understanding. But, we are not left with nothing but guessing about God. The Creeds began as baptismal formulae and through baptism we are invited into the mystery of a God who is One, yet Threefold. We are invited into the mystery of a God who does not remain aloof, but became one with humanity and the dusty world through the Incarnation - for us and for our salvation. We are invited into the mystery of Jesus Christ who is, in a mystery beyond our comprehending, both human and divine. We are invited into the mystery of the forgiveness of sin. And so on.
Rather than constraining mystery, the Creeds, particularly the Nicene Creed, were conceived as means to preserve that mystery from the tendency to domesticate Christian faith in one way or another to make it less paradoxical or more intellectually comfortable. That is one way to understand the various heresies rejected by the Church. It was the heretics who in fact presumed to know more about the mystery of God than is prudent, not those who defended what came to be known as the “catholic” faith summarized in the Creeds. It was the heretics, not the orthodox, who insisted on resolving paradoxes like the Incarnation and the Triune character of the Godhead. The Creed is the Christian way into the the mystery of God.Read it all.
I have increasingly come to understand the Nicene Creed less and less as a straight jacket that stifles critical thinking and kills the spirit and more and more as an opening into a whole world of meaning and purpose, and an invitation into the life of God. As coldly analytic and rational as it may sound, the Creed is actually a mystical opening into transforming relationship with the triune God.
The articles of the Creed touch on the mysteries at the heart of Christian faith. Putting mystery into words is, of course, awkward at best. The mysteries of God cannot be contained by rational explanations. But like a compass that always points north, the Nicene Creed points us in the right direction. The compass is not the destination just as the Creed is not God. But it would be much easier to get lost as to what is truly essential for reaching the goal of the Christian journey without it.