[151] And, besides this, by this commandment he points out that it is right not to look only at the present, but also by the acuteness of the reasoning powers to survey the future afar off as from a watch-tower, since nothing remains long in the same condition, but everything is subject to alternations and variations; so that it is natural that those who have for a while been enemies, when they have sent heralds and made overtures towards reconciliation, should again become friends in the bonds of peace.