Romans 11:7-12 God's People Are Blind

What then? What the people of Israel sought so earnestly they did not obtain. The elect among them did, but the others were hardened, as it is written:
“God gave them a spirit of stupor,

eyes that could not see

and ears that could not hear,

to this very day.”

And David says:
“May their table become a snare and a trap,

a stumbling block and a retribution for them.

 May their eyes be darkened so they cannot see,

and their backs be bent forever.”

We learn here, that aside from His remnant, God himself hard his peoples hearts so that they could not understand.  We might say "Shame on them," but what about the church.  Do all in the church have eyes that can see, ears that can hear, and hearts that understand?  Certainly not!  Aside from the remnant, the church finds itself running in place.  They listen and don't do anything.  They do not esteem Christ, even though he is the source for eternal life.  And they don't live a life of holiness.  So what are they to do.  Repent and turn from their evil ways.  Agree with God about their own sinfulness and turn to him for salvation so that they can be born anew, not of the flesh, but of the Spirit.