To better understand the causes and solutions for a hardened heart, it’s important to understand the broad biblical meaning of the word “heart.” The Bible considers the heart to be the hub of human personality, producing the things we would ordinarily ascribe to the “mind.” For example, Scripture informs us that grief (John 14:1); desires (Matthew 5:28); joy (Ephesians 5:19); understanding (Isaiah 6:10; Matthew 13:15); thoughts and reasoning (Genesis 6:5; Hebrews 4:12; Mark 2:8); and, most importantly, faith and belief (Hebrews 3:12; Romans 10:10; Mark 11:23) are all products of the heart. Also, Jesus tells us that the heart is a repository for good and evil and that what comes out of our mouth – good or bad – begins in the heart (Luke 6:43–45).