is a term often used in Scripture to denote ignorance or a want of discernment in divine things, as well as the being destitute of natural sight (Isaiah 6:10; Isaiah 42:18-19; Matthew 15:14). " Blindness of heart" is the want of understanding arising from the influence of vicious passions, while " hardness of heart" is stubborness of will and absence of moral feeling (πώρωσις, Mark 3:5; Romans 11:25; Ephesians 4:18).