As Moses had to veil his luminous face, so, metaphorically, the God of this age mercifully blinds carnal individual for now because light hurts their eyes.
God has allowed carnal nature to remain in His people so He can determine whether they seriously want to defeat the downward pulls of the flesh.
When Satan confronted Adam and Eve, he fed them three heresies that Gnosticism incorporated into its parasitic philosophy and way of life.
God's calling is personal and individual rather than general, opening otherwise closed minds, replacing spiritual blindness with spiritual understanding.
On the Road to Emmaus, some of Christ's followers were agitated, confused, and in turmoil, being unable to put the scriptures and the physical facts together.
The strife between this world's belief systems shows that God did not originate them. False teachings are dangerous because they can erode the faith.
Two blind have faith that Jesus can heal, but disobey His command not to tell anyone. Even so, they did not let their handicap keep them from seeking Christ.
God's Spirit will never prod us to do anything that is not godly love, and because it a spirit of a sound mind, it will never motivate us to do crazy things.
Like Job, we must surrender to God's will and purpose for our lives, realizing that both pleasant and horrendous times work for our spiritual development.