'Beclouded' in the Bible

for their [moral] understanding is darkened and their reasoning is clouded; [they are] alienated and self-banished from the life of God [with no share in it; this is] because of the [willful] ignorance and spiritual blindness that is [deep-seated] within them, because of the hardness and insensitivity of their heart.

and He must not be a new convert, so that he will not [behave stupidly and] become conceited [by appointment to this high office] and fall into the [same] condemnation incurred by the devil [for his arrogance and pride].