John 11:9-10
Jesus answered, "Are there not twelve hours in a day? [i.e., hours of daylight]. If a person walks during daylight, he will not stumble because he can see [by] the sun's light.
John 12:35
So, Jesus said to them, "The Light will be among you for only a little while [longer]. Walk around while you [still] have the Light [with you], before darkness surrounds you. For the person who walks around in darkness does not know where he is going.
John 12:40
"God has blinded their eyes [of understanding] and closed their minds. If He had not done so, they would [be able to] see with their eyes and understand with their minds and turn [to God] so He could heal them [spiritually]."
1 John 2:11
But the person who hates his brother is in the darkness [of sin] and he lives in [harmony with] that darkness, and he does not know where he is heading, because the darkness [of sin] has blinded his eyes [to his spiritual condition].