Your sorrow will turn to joy
The religious leaders believe that crucifying Jesus, who claimed to be the Son of God, is something that they should take pride in and praise God for. Secretly, they kill him for selfish reasons, not out of zeal for God or Rome as they claim (12:42–43; 19:7, 12).
The name of a person or people expressed what the person or people thought the proper description or statement of character was
Adam names the animals according to their nature (Gn 2:19, 20); “Noah” means “one who brings relief and comfort” (5:29); “Jesus” means “savior” (Mt 1:21). When a person was given a new position or a radical change took place in his life a new name was given to indicate that new aspect, for example, Abraham (“father of many,” Gn 17:5);
The words in My name are not a magical formula which enable the user to get his will done; instead those words tied the requests to the work of the Son in doing the Father’s will (cf. “in My name” in 14:13–14; 15:16; 16:24, 26).
That your joy may be full. By this he means that nothing will be wanting which could contribute to a perfect abundance of all blessings, to the accomplishment of our desires, and to calm satisfaction, provided that we ask from God, in his name, whatever we need.