Enns and Wright are expressing what a lot of us feel about so-called "salvation by dogma," as though one is truly converted merely by having one's doctrinal ducks in a row.
But they take their objections way too far. One must first believe "that He is, and that He is a rewarder of those who seek Him." The Apostle John explains that "the one who abides in
the teaching has both the Father and the Son (2 John 9 emphasis mine)." The following verses of John's second epistle drive home the point:
If anyone comes to you and does not bring this teaching, do not receive him into your house nor give him a greeting, for the one who does so participates in his evil deeds (verses 9 and 10 emphasis added).
One must believe in the God of the bible, the God revealed in Scripture. While Mr. Enns is right to say that God is beyond what our limited facilities can perceive, He has nevertheless revealed Himself to us limited creatures in Christ, in Christ's teachings, and in His word, "the teaching."
This is the same argument used by those who say, "The Lord said and did much more than just what is recorded in scripture, therefore we must accept as true more than just scripture."
But the writer of Corinthians warns:
...in us you might learn not to exceed what is written, so that none of you will become arrogant in behalf of one against the other (1st Corinthians 4:6, emphasis mine)
He was speaking of himself and Apollos, neither of which sought disciples of their own, but sought to bring disciples to Christ - the God revealed in the things
written.