Jesus wasn’t being disrespectful. He was simply showing the difference between His blood family, and His spiritual family. Elsewhere in Luke we can find Him repeating this notion when He says, “Blessed are those who hear the word of God and obey it.” (Luke 11:28) When we become a Christian, we are adopted into and become part of the family of God. And part of being in this family is listening to the word of God and then applying it to our own life…practicing until it becomes a habit.
Humans and religion have always gotten into trouble when they attempted to overlay the Word of God with ritual and tradition. So the message in the Scriptures above are quite simple…don’t even think of adding to or subtracting from what it says in the Bible. We are reminded of the authority and sufficiency of the word of God in II Timothy 3:16 that reads, “All of Scripture is God-breathed and is useful for teaching, rebuking, correcting, and training in righteousness, so that the man of God may be thoroughly equipped for every good work.” The Bible contains everything we need for salvation, trust, hope, and love….its words more than adequate to meet every need and accomplish God’s divine purpose in our life.