And then the Savior admonished Peter not always to follow his own inclinations, and impulsive nature; but ever to do his duty as the Shepherd of the Fold. When Peter was young, and did not have the knowledge and responsibility he now possessed, he could go fishing, and make money, or study, or do whatever he wished, but now he must attend to his duties in the Kingdom of God no matter what might come to him personally in doing so. Even though Peter's duty led to the cross, the Savior said, "Follow me." While this conversation was going on, Jesus and Peter were walking alone a little ahead of the others. Peter turned, and saw John following close to them. "Lord," said Peter, "what is John to do?" "If I will that he tarry till I come, what is that to thee, follow thou me." As much as to say, Just attend faithfully to your duty, Peter, teach others to do the same, and all will be well. This is the last recorded word of Christ to Peter; but he was present of course when the Savior gave His final charge to the Twelve. [1] From this time Peter's zeal in the Work of the Ministry was constant, and his boldness unsubdued. Footnotes: 1. Mark 16:16 LESSON 11 A TRUE LEADER AND VALIANT DEFENDER "The reward of one's duty done is the power to do another." With a knowledge that Jesus Christ was his Savior, that he was happiest when he did what his Lord wanted him to do, and that when he did wrong or yielded to the influence of evil men, he was miserable, Peter, began his great mission as chief apostle and president of the Twelve. [Sidenote: In Jerusalem.] In accordance with the Savior's command "that they should not depart from Jerusalem" until they received the Holy Ghost, for some time after the Lord's ascension, made his home in the Holy City. Here he and James and John, and others of the Eleven, frequently met in an upper room, perhaps the same room in which Jesus had eaten the Passover with His disciples. With them were Mary, the Mother of Jesus, and some other women. AN APOSTLE CHOSEN [Sidenote: A New Apostle Chosen.] On one of these occasions, there were present one hundred and twenty people, "all engaged in prayer and supplication." Peter arose in their midst and said it was necessary to choose a man who had been faithful in following the Savior to take the place of the traitor, Judas, in the Quorum of Twelve Apostles. There were two names suggested, Joseph called Barsabas, and Matthias. Knowing that the Lord should choose the men who were to be His special witnesses, they prayed, saying, "Thou, Lord, who knowest the hearts of all men, show whither of these two Thou hast chosen." Then they "gave forth their lots; and the lot fell upon Matthias; and he was numbered with the eleven apostles." THE DAY OF PENTECOST [Sidenote: The Holy Ghost.]