Mourning - meaning

Why does Jesus say blessed are they that mourn? There is a time to mourn (Ecclesiastes 3:4). Mourning is part of the process of repentance. It prepares for a change of heart. Fasting is associated with mourning, a short period of abstinence from foods in order to pray. We need to mourn and humble ourselves before God (James 4:7-10), cleansing our hands of dirty deeds and purifying our hearts of wrongful thoughts. If we find no joy in our mistakes, or evils of this world, then there is hope for a change of heart. If we then turn to God to save us, he will bless and comfort us.