But even men who are full of Christian courage need props and bulwarks in the hour of trial. Ezra and Nehemiah were bold, but they had ways of stimulating their courage, which they sometimes needed to fall back on, and they could find allies in unlikely quarters. Ezra could draw courage even from his shame, and Nehemiah from his very pride. "I was ashamed," said Ezra, "to require of the king a band of soldiers and horsemen to help us against the enemy in the way;" therefore he determined to face the danger with no help but the unseen help of God. And when Nehemiah's life was in danger from the cunning devices of the enemy, and his friends advised him to hide himself, he repelled the advice with high-minded scorn--"Should such a man as I flee?" 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.