But it is not enough to say that the mystery of the Trinity is in the Bible unless we recognize that the thing we are calling the Bible is a set of texts that were written, redacted, and canonized to prepare for and report on the missions of the Son and the Spirit. To somebody about to comb through the texts to find elements of the doctrine, we have to say: the Trinity is in the Bible because the Bible is in the Trinity. . . .

The triunity of God has always been, was once concealed, but is now revealed. The manner of its revelation should establish the order and structure of the doctrine concerning it, as well as the order and structure of adjacent doctrines like revelation and salvation.

Fred Sanders, The Triune God, 44, 68.