***The way the term “Gnostic” is used around here I suspect the polar opposite would be “Empiricist.”
An empiricist accepts as certain knowledge only that which is obtained by sensory perception, and to that he adds reason. He excludes Spiritual perception on principle.***
By the grace of God, we Catholics are neither. We are instructed not to tempt God or to demand proofs, as empiricists (such as St. Thomas) do. We believe; we have faith. We hope in eternal salvation with God in Heaven.
We do as we are instructed. We have the Faith; we are neither Gnostic nor empiricist.
***Man is not the “measure” of God. ***
No, he is not. Man is the creature of God made in His own image. With many here, God is the creature of man made in his own image.