What is spiritual blindness according to the Bible?

The concept of spiritual blindness is illustrated in John 9:39-41, where Jesus distinguishes between those who see (and are thus held accountable for their sin) and those who are blind (and receive grace). Spiritual blindness often manifests as self-righteousness or pride, where individuals believe they are deserving of salvation based on their own merits. This condition prevents true understanding and acceptance of God's truth. It highlights the need for divine intervention, as only by God's grace can one be awakened to the reality of their sin and their need for Him. To be made to see spiritually is to receive sight through the understanding of God's love and mercy extended through Christ.