Our Readers Ask: Does God Have a Beginning?
"As difficult as the concept of God's eternity is to grasp, we cannot dismiss the idea simply because we cannot fully comprehend it. How reasonable is it that we should expect to understand all of God's ways.. There are aspects of Jehovah God and his workings that are too deep for our minds to fathom."
WT, July 1, 2010
In this instance, the idea of "mystery" and aspects of God being incomprehensible are ok, while at the same time Christendom is mocked for believing in the Trinity, because it's beyond our reasoning/comprehension.