Whereas I trust Him.
There is no trusting Christ without trusting His Church. There is no loving Christ without loving His Church. There is no serving Christ without serving His Church.
Gnostics worship the spiritual and despise the material. But Christ is incarnate, and likewise His Church (His mystical body) is material and visible. We cannot in fact choose between trusting Christ and trusting His Church. The two necessarily go together.
-A8
Since taking the Father's words on THIS would be circular logic, surely you have a verse to point to for it.