And Pharisees came up and in order to test him asked, “Is it lawful for a man to divorce his wife?” He answered them, “What did Moses command you?” They said, “Moses allowed a man to write a certificate of divorce and to send her away.” And Jesus said to them, “Because of your hardness of heart he wrote you this commandment. But from the beginning of creation, ‘God made them male and female.’ ‘Therefore a man shall leave his father and mother and hold fast to his wife, and the two shall become one flesh.’ So they are no longer two but one flesh. What therefore God has joined together, let not man separate.”Mark 10:2-9English Standard Version (ESV)
The Curt Jester wrote a great piece regarding the Roman Catholic Church and divorce (and remarriage). He notes that the RC church is accused of being hard of heart for keeping its “old-fashioned” stance on divorce and remarriage. As noted in the scripture above, Jesus addresses that. It is for our (Yes, Jesus was speaking to the Pharisees, but He was also speaking to us all.) hardness of heart that divorce was allowed at all+.
When he wrote his piece, the Curt Jester was specifically address the selfish nature of people. However, this really isn’t just about selfishness.