Acts 26:18

To open their (spiritual) eyes so that they may turn from darkness to light and from the power of Satan to God, that they may receive forgiveness and release from their sins and an inheritance among those who have been sanctified (set apart, made holy) by faith in Me.

Every person has spiritual eyes that can be blinded to God and His Word in darkness by sin. Salvation clears away the blinders, allowing a sinner to see the error. Conviction from God leads to repentance, forgiveness, and revelation-like waking up and finding another world that exists. That world exists in the Bible!