"The world" is not going to believe Jesus! They're already "righteous" or so they believe!
Jesus said in
Luke 5:32
"I have not come to call
the righteous, but sinners, to repentance.”
Therefore those who (((THINK))) they're already righteous won't hear Jesus!
Back to the initial verse given,
"Enter ye in at the strait gate: for wide is the gate, and broad is the way, that leadeth to destruction, and many there be which go in thereat: Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it" (
Matthew 7:13-14)!