47 Whoever belongs to God hears what God says. The reason you do not hear is that you do not belong to God.” (John 8:47)
18 They are darkened in their understanding and separated from the life of God because of the ignorance that is in them due to the hardening of their hearts. (Ephesians 4:18)
18 Open my eyes that I may see
wonderful things in your law. (Psalm 119:18)
130 The unfolding of your words gives light;
it gives understanding to the simple. (Psalm 119:130)
45 Then he opened their minds so they could understand the Scriptures. (Luke 24:45)
17 I will rescue you from your own people and from the Gentiles. I am sending you to them 18 to open their eyes and turn them from darkness to light, and from the power of Satan to God, so that they may receive forgiveness of sins and a place among those who are sanctified by faith in me.’ (Acts 26:17-18)
Also – John 9:1-11, 15-29, 34-41