What is the difference between mourning and grieving?

Genesis 37:34-35Then Jacob tore his clothes and dressed himself in burlap. He mourned deeply for his son for a long time. His family all tried to comfort him, but he refused to be comforted. “I will go to my grave mourning for my son,” he would say, and then he would weep.

Isaiah 61:1-3The Spirit of the Sovereign Lord is upon me, for the Lord has anointed me to bring good news to the poor. He has sent me to comfort the brokenhearted and to proclaim that captives will be released and prisoners will be freed. He has sent me to tell those who mourn that the time of the Lord’s favor has come, and with it, the day of God’s anger against their enemies. To all who mourn in Israel, he will give a crown of beauty for ashes, a joyous blessing instead of mourning, festive praise instead of despair. In their righteousness, they will be like great oaks that the Lord has planted for his own glory.

Mark 16:9-11After Jesus rose from the dead early on Sunday morning, the first person who saw him was Mary Magdalene, the woman from whom he had cast out seven demons. She went to the disciples, who were grieving and weeping, and told them what had happened. But when she told them that Jesus was alive and she had seen him, they didn’t believe her.

Usually, grief and grieving refer to a person’s emotions, what he or she is feeling inside. Mourning usually refers to a person’s actions as a result of what he or she is feeling: weeping, crying aloud, even tearing clothes. That is why we read, “He was despised and rejected—a man of sorrows, acquainted with deepest grief” (Isaiah 53:3) and “You have turned my mourning into joyful dancing. You have taken away my clothes of mourning and clothed me with joy” (Psalm 30:11).