The Ten Commandments divide into two parts. The first four commandments teach us how to relate to God and the final six teach us how to relate to one another. The fifth commandment, to honor father and mother, is unique. The fifth commandment is a bridge as parents both participate in the divine activity of creation and are the first neighbor many of us will ever know. Therefore, we are to honor them.

Resources:

Exodus 20:12

Exodus: Saved for God’s glory by Phil Ryken
Keeping the Ten Commandments by JI Packer
The Ten Commandments: Ethics for the 21st Century by Mark Rooker

Commandment Five by Mark Driscoll