“Honour your father and your mother, that your days may be long upon the land which the Lord your God is giving you.” Exodus 20:12
The first four Commandments deal with our duty to God. The last six Commandments deal with our duty to man.
Our Lord Jesus Christ summarised the two tablets of the Law when He answered the question concerning which is the greatest Commandment. Jesus said: “You shall love the Lord your God with all your heart, with all your soul, and with all your mind. This is the first and great Commandment. And the second is like it: ‘You shall love your neighbour as yourself. On these two Commandments hang all the Law and the prophets.’” Matthew 22:36-40