'Blindness' in the Bible
And they struck the men who were at the door of the house with blindness [which dazzled them], from the youths to the old men, so that they wearied themselves [groping] to find the door.
The Lord will smite you with madness and blindness and dismay of [mind and] heart.
And when the Syrians came down to him, Elisha prayed to the Lord, Smite this people with blindness, I pray You. And God smote them with blindness, as Elisha asked.
You will give them hardness and blindness of heart; Your curse will be upon them.
In that day, says the Lord, I will smite every horse [of the armies that contend against Jerusalem] with terror and panic and his rider with madness; and I will open My eyes and regard with favor the house of Judah and will smite every horse of the opposing nations with blindness.
Their moral understanding is darkened and their reasoning is beclouded. [They are] alienated (estranged, self-banished) from the life of God [with no share in it; this is] because of the ignorance (the want of knowledge and perception, the willful blindness) that is deep-seated in them, due to their hardness of heart [to the insensitiveness of their moral nature].
Yet I am writing you a new commandment, which is true (is realized) in Him and in you, because the darkness ( moral blindness) is clearing away and the true Light ( the revelation of God in Christ) is already shining.