I believe some of Jesus' teachings about discipleship come from I Kings 19:19-21. The rabbis viewed the relationship of Elisha to Elijah as a role model for a disciple. Here are the verses:
19 Elijah left there and found Elisha son of Shaphat as he was plowing. Twelve teams of oxen were in front of him, and he was with the twelfth team. Elijah walked by him and threw his mantle over him. 20 Elisha left the oxen, ran to follow Elijah, and said, “Please let me kiss my father and mother, and then I will follow you.”
“Go on back,” he replied, “for what have I done to you?”
21 So he turned back from following him, took the team of oxen, and slaughtered them. With the oxen’s wooden yoke and plow, he cooked the meat and gave it to the people, and they ate. Then he left, followed Elijah, and served him.
This seems to have some bearing on the Rich Young Ruler.
The account of the Rich Young Ruler can easily be misunderstood to teach salvation by commandment keeping. How do you best understand it? Comments welcome. Much has been written about such a text, but the ability to share your view succinctly evidences an understanding vs. avoidance by detail (which, IMO, is sometimes the case).
Matthew 19:16-22 (ESV) reads:
16 Just then someone came up and asked him, “Teacher, what good must I do to have eternal life?”
17 “Why do you ask me about what is good?” he said to him. “There is only one who is good. If you want to enter into life, keep the commandments.”
18 “Which ones?” he asked him.
Jesus answered: Do not murder; do not commit adultery; do not steal; do not bear false witness; 19 honor your father and your mother; and love your neighbor as yourself.
20 “I have kept all these,” the young man told him. “What do I still lack?”
21 “If you want to be perfect,” Jesus said to him, “go, sell your belongings and give to the poor, and you will have treasure in heaven. Then come, follow me.”
22 When the young man heard that, he went away grieving, because he had many possessions.