All the disciples had serious faults when Jesus called them to His service. Even John, who came into closest association with the meek and lowly One, was not himself naturally meek and yielding. He and his brother were called “the sons of thunder.” While they were with Jesus, any slight shown to Him aroused their indignation and combativeness. Evil temper, revenge, the spirit of criticism, were all in the beloved disciple. He was proud, and ambitious to be first in the kingdom of God. But day by day, in contrast with his own violent spirit, he beheld the tenderness and forbearance of Jesus, and heard His lessons of humility and patience. He opened his heart to the divine influence, and became not only a hearer but a doer of the Saviour’s words. Self was hid in Christ. He learned to wear the yoke of Christ and to bear His burden.
Jesus reproved His disciples, He warned and cautioned them; but John and his brethren did not leave Him; they chose Jesus, notwithstanding the reproofs. The Saviour did not withdraw from them because of their weakness and errors. They continued to the end to share His trials and to learn the lessons of His life. By beholding Christ, they became transformed in character.
The apostles differed widely in habits and disposition. There were the publican, Levi-Matthew, and the fiery zealot Simon, the uncompromising hater of the authority of Rome; the generous, impulsive Peter, and the mean-spirited Judas; Thomas, truehearted, yet timid and fearful, Philip, slow of heart, and inclined to doubt, and the ambitious, outspoken sons of Zebedee, with their brethren. These were brought together, with their different faults, all with inherited and cultivated tendencies to evil; but in and through Christ they were to dwell in the family of God, learning to become one in faith, in doctrine, in spirit…
– The Desire of Ages, pgs. 295, 296