Thou shalt make a battlement for thy roof - Deuteronomy 22:8

The householder was not to be content with what would be safe for himself; he must see to it that the undefended roof of his house should not be a source of danger to little children, the weak, or the careless. He might be able to walk on the roof of his house with so sure a foot as not to need the parapet or trellis-work, warning him from the edge; but what he could do might be impossible for feet less sure than his. Hence the need of the battlement! Each new house must have its battlement around the margin of its roof.

This should be the law for each new home. - Wherever a household is constituted, battlements should be built to protect, as far as possible, the weak and tempted. The pace of the household should be that of the feeblest of its members. You are careful to have the balustrade and the little swing gate, not that the grown-up require them, but for the protection and safety of young and feeble life. Similarly build the battlement of total abstinence, of the discountenance of worldly amusement, of the habit of family worship. Guard against exposure to needless temptation, and occasions for falling.

This should be the law in older households. - It becomes the master of the home sometimes to go around his household, to study his own character, to inspect the condition of the battlements. Is there laxity, inconsistency, need of precaution? Let us search our hearts and lives, our habits, and the ordering of our homes, that the battlements may be strengthened where they are weak, or erected where they are wanting. "Look not every man on his own things, but every man also on the things of others."