Honor thy father and thy mother. The obligation of filial respect, love, and reverence is so instinctively' felt by all, that the duty has naturally found a place in every moral code. In the maxims of Ptah-hotep, an Egyptian author who lived probably before Abraham, "the duty of filial piety is strictly inculcated".
Confucius, in China, based his moral system wholly upon the principle of parental authority; and in Rome it may be regarded as the main foundation of the political edifice. In the Decalogue, the position of this duty, at the head of our duties towards our neighbour, marks its importance; which is further shown by this being "the first commandment with promise" (Ephesians 6:2).
It is curious that the long life here specially attached to the observance of this obligation, was also believed to accompany it by the Egyptians. "The son," says Ptah-hotep, "who accepts the words of his father, will grow old in consequence of so doing;" and again—"The obedient son will be happy by reason of his obedience; he will grow old; he will come to favour."
Modern commentators generally assume that the promise was not personal, but national—the nation's days were to be "long upon the land," if the citizens generally were obedient children. But this explanation cannot apply to Ephesians 6:1-3.
And if obedience to parents is to be rewarded with long life under the new covenant, there can be no reason why it should not have been so rewarded under the old. The objection that good sons are not always long-lived is futile.
God governs the universe by general, not by universal laws.