Specifically, 'unmodified' human will, or all humans in general. Can anyone who hears the gospel either believe that Jesus is Lord and Messiah or reject Him? Or are humans incapable of believing in Christ at all, and somehow a select few given the capacity to believe?
John 3:14 - 16
ESV - 14 And as Moses lifted up the serpent in the wilderness, so must the Son of Man be lifted up. 15 That whoever believes in him may have eternal life.
For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.