12Honor your father and your mother, so that your days may be long in the land that the Lord your God is giving you. 13You shall not murder.14You shall not commit adultery. 15You shall not steal. 16You shall not bear false witness against your neighbor. (Exodus 20:12-16, NRSV)
Honor your father and mother is the only commandment in the 10 commandments that comes with a promise. If you honor your father and mother you will have a long life. Maybe this is because of the other commandments that say if your children disobey you you should take them outside the city and stone them to death!
Or maybe it is because you were a gift to your parents from God and by honoring them you are showing God honor and by following them you are showing God you can follow God.
And all of these commandments help us to love others and that is what God wants us to do. So honor and love.