To meditate therein day and night, that he might understand it and have it ready in him upon all occasions. If ever any man's business might have excused him from meditation, and other acts of devotion, one would think Joshua's might at this time. It was a great trust that was lodged in his hands; the care of it was enough to fill him, if he had had ten souls, and yet he must find time and thoughts for meditation. Whatever affairs of this world we have to mind, we must not neglect the one thing needful. [2.] Not to let it depart out of his mouth; that is, all his orders to the people, and his judgments upon appeals made to him, must be consonant to the law of God; upon all occasions he must speak according to this rule, Isa. viii. 20. Joshua was to maintain and carry on the work that Moses had begun, and therefore he must not only complete the salvation Moses had wrought for them, but must uphold the holy religion he had established among them. There was no occasion to make new laws; but that good thing which was committed to him he must carefully and faithfully keep, 2 Tim. i. 14. [3.] He must observe to do according to all this law. To this end he must meditate therein, not for contemplation sake only, or to fill his head with notions, or that he might find something to puzzle the priests with, but that he might, both as a man and as a magistrate, observe to do according to what was written therein; and several things were written there which had particular reference to the business he had now before him, as the laws concerning their wars, the destroying of the Canaanites and the dividing of Canaan; &c.; these he must religiously observe. Joshua was a man of great power and authority, yet he must himself be under command and do as he is bidden. No man's dignity or dominion, how great soever, sets him above the law of God. Joshua must not only govern by law, and take care that the people observed the law, but he must observe it himsel...
