Matthew 19:1
And it came to pass, that when Jesus had finished these sayings, he departed from Galilee, and came into the coasts of Judaea beyond Jordan; And it came to pass, that when Jesus had finished these sayings, he departed from Galilee, and came into the coasts of Judaea beyond Jordan;
Matthew 19:1 closes Jesus' sayings and teaching in Galilee and records His departure from Galilee to the coasts of Judea beyond the Jordan. It places the teachings that follow on His last journey to Jerusalem. It introduces His teaching about duty toward the law. The chapter it begins is marked by its lesson of humility, shown in Christ.
It introduces the question of marriage, which is decided by the original order established in Eden: polygamy was contrary to that order and brought unhappiness to families. In that teaching on marriage and divorce, polygamy is forbidden and remarriage after divorce is allowed only when the divorce was for fornication; remarriage after divorce for other causes is adultery. It places the rich man's encounter with Jesus in the context of loving one's neighbor as oneself: he claimed to love his neighbor but showed that he did not when he refused to give his goods to the poor.
The account of the rich young man shows that keeping the commandments was not enough to follow Jesus rightly; he also had to give up his heart's attachment to wealth. Jesus asked him to give absolutely all and follow Him because He wanted that young man to become a herald and evangelist for Him in giving His message to the world. That command to sell everything was specific to that young man and not a requirement for everyone. God leaves those with children and a little home to keep them, and leaves others to keep property so they may make much more for the support of His cause, dealing with different men in different ways according to disposition, needs, abilities, and gifts. What each person is to do is let go of whatever competes with following Jesus, stand responsive to His call, and do with simple faith what He directs.