Spiritual darkness is the state of a person who is living apart from God. The Old Testament book of Isaiah, in prophesying of the Messiah, speaks of a deep spiritual darkness that enveloped the people: “The people walking in darkness have seen a great light; on those living in the land of deep darkness a light has dawned” (Isaiah 9:2). This passage reappears in the New Testament, in Matthew 4:16, to announce that those who have come to know the God of Israel through His Son Jesus Christ are the ones who have been delivered from spiritual darkness and now walk in the light of God’s life.