But there is no source of courage like that which flows from the consciousness of serving God, and the consequent assurance that He will sustain and help His servants. Brief ejaculatory prayers, constantly dropping from their lips, often bring the courage which is needed. "Now, therefore, O God, strengthen my hands," was Nehemiah's habitual exclamation when faintness of heart came over him. No doubt it was Joshua's too, as it has always been of the best of God's servants. Again and again, amid the murderous threats of cannibals in the New Hebrides, the missionary Paton must have sunk into despair but for his firm belief in the protection of God.
The other counsel to Joshua was to follow in all things the instructions of Moses, and for this end, not to let "the book of the law depart out of his mouth, but to meditate on it day and night, that he might observe to do all that was written therein."
For Joshua was called to be the executor of Moses, as it were, not to start on an independent career of his own; and that particular call he most humbly and cheerfully accepted. Instead of breaking with the past, he was delighted to build on it as his foundation, and carry it out to its predestined issues. It was no part of his work to improve on what Moses had done; he was simply to accept it and carry it out. He had his brief, he had his instructions, and these it was his one business to fulfil. No puritan ever accepted God's revelation with more profound and unquestioning reverence than Joshua accepted the law of Moses. No Oliver Cromwell or General Gordon ever recognised more absolutely his duty to carry out the plan of another, and, undisturbed himself, leave the issue in His hands. He was to be a very incarnation of Moses, and was so to meditate on his law day and night that his mind should be saturated with its contents.
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.