This, indeed, was a necessity for Joshua, because he required to have a clear perception of the great purpose of God regarding Israel. Why had God taken the unusual course of entering into covenant with a single family out of the mass of mankind? A purpose deliberately formed and clung to for more than four hundred years must be a grand object in the Divine mind. It was Joshua's part to keep the people in mind of the solemnity and grandeur of their mission and to call them to a corresponding mode of life. What can more effectually give dignity and self-respect to men than to find that they have a part in the grand purposes of God? To find that God is not asleep; that He has neither given up the world to chance nor bound it with a chain of irreversible law, but that He calls us to be fellow-workers with Him in a great plan which shall in the end tend gloriously to advance the highest welfare of man? This habit of meditation on the law which Joshua was instructed to practise was of great value to one who was to lead a busy life. No mere cursory perusal of a book of law can secure the ends for which it is given. The memory is treacherous, the heart is careless, and the power of worldly objects to withdraw attention is proverbial. We must be continually in contact with the Book of God. The practice enjoined on Joshua has kept its ground among a limited class during all the intervening generations. In every age of the Church it has been impressed on all devout and earnest hearts that there can be no spiritual prosperity and progress without daily meditation on the Word of God. It would be hard to believe in the genuine Christianity of any one who did not make a practice morning and evening of bringing his soul into contact with some portion of that Word. And wherever an eminent degree of piety has been reached, we shall find that an eminently close study of the Word has been practised. Where the habit is perfunctory, the tendency is to omit the meditation and to be content with the reading. Even in pious families there is a risk that the reading of the Scriptures morning and evening may push the duty of meditation aside, though even then we are not to despise the benefit that arises from the familiarity gained with their contents.