One of the ten commandments is to honor thy father and mother~ Deuteronomy 5:16
Jesus said we must honor our parents, mother and father. No matter what we think of our parents as people, as Christians and as sinners, God asks us to honor them as He is the source of their authority. It is for the purpose of experiencing God's social hierarchy, His order of things in this world so that we can begin to understand His world which in its spiritual aspect reflects and respects levels of spiritual authority ~ namely His which stands at the apex.
It is not for our harm... but for our salvation and eternal life that He asks this of us. Though the Mosaic law 'ten commandments' were of the Old Testament we know that they served a purpose then and now. Yes, Jesus came to forgive us of our sin so that we may have eternal life but He also stressed the very first commandment which is to love the Lord God with all our heart, soul and mind. Therefore, the ten commandments remain an integral aspect of God's purpose and authority. We understand then that the God's authority in our life does not change. In the New Testament we learn this through His Son Jesus Christ and we are changed from carnal beings into a new creation in Him. With this knowledge, we become salt and light. As such, we are asked to follow Jesus, we know that parents are asked the same and because of that, we honor them. And, we can rest in knowing that our children will do the same. This creates a level of awareness and appreciation for God's authority and purpose for us which is to give peace to our being in this fallen world.