the forces of secularization probably explain why psychology and psychiatry have successfully infiltrated (and subverted) most of the established church
It's the combined truth of 2 Peter 2:1-2 and Galatians 1:8-9, resulting in 2 Thessalonians 2:3 and creating the present state of Romans 8:20.
To paraphrase, I am saying that the scriptures teach us that 2,000 years ago there were false teachers bringing in destructive false teachings, and that those who have followed the false teachings have become accursed. Now we are in a time of apostasy whereby even those who are the most religious, because of their false teachings, are not following the conviction of the Holy Spirit in order to become what God wants them to become. Instead, they cling to the beliefs that they have been taught are their salvation, being pitted against the truth, and thus creation groans eagerly for the revealing of the sons of God.
Ephesians 4 has a nice description of the intended function of the Christian people, whereby we all are cooperating not by negotiating and democratically assigning the work loads, but by each of us doing our part. When each is doing its part effectively, the whole body grows in love and when that happens perfectly, it will grow to obtain the fullness of the stature of Christ.
The false doctrines result in a Christian being cursed to always think that they are not worthy of carrying Christ's name, and thus it is unthinkable for them that anyone could possibly say "I am He!".. therefore they would never speak with such authority, and because they do not have the authority of Christ, nor are they born of the same spirit, they are not able to accurately know the doctrines of spirituality (1 Corinthians 2:14) and so they naturally concede to the doubts of secular philosophy when they find that they also happen to have the same (carnal, unspiritual) views.