Reconciliation is a major theme in the Bible; reconciled to God, and reconciled to each other. Genesis 4 helps us discover causes of conflict and some solutions. Cain and Abel both brought sacrifices to God. Cain's heart toward God was not right, therefore his offering was unacceptable. Cain became angry and depressed, and killed his brother. Learn God's foolproof solution that still works for those who are angry and depressed.