Luke 14:31

(31) What king, going to make war against another king . .?—Here also there may have been a side-glance at contemporary history. The Tetrarch’s divorce of his first wife had involved him in a war with her father Aretas, an Arabian king or ethnarch (see Note on Luke 3:14), in which his army was destroyed, and the Jewish historian sees in this the commencement of all his subsequent misfortunes (Jos. Ant. v., 18:5, § 1).

In the spiritual interpretation of the two parables, the tower reminds us of the house in Matthew 7:24-27, and so stands for the structure of a holy life reared on the one Foundation; the warfare brings to our remembrance the conflict described in Matthew 12:29. Here it stands partly for the conflict which every Christian carries on against sin, the world, and the devil, and of which we should take a clear estimate before we enter on it, partly for the greater war on which Christ Himself had entered, and of which He too had counted the cost— that being, in His case, nothing less than the sacrifice of His own life.