Charles H. Spurgeon on Psalms 4:1

"Hear me." The great Author of nature and of all things does nothing in vain. He instituted not this law, and, if I may so express it, art of praying, as a vain and insufficient thing, but endows it with wonderful efficacy for producing the greatest and happiest consequences. He would have it to be the key by which all the treasures of heaven should be opened. He has constructed it as a powerful machine, by which we may, with easy and pleasant labour, remove from us the most dire and unhappy machinations of our enemy, and may with equal ease draw to ourselves what is most propitious and advantageous. Heaven and earth, and all the elements, obey and minister to the hands which are often lifted up to heaven in earnest prayer. Yea, all works, and, which is yet more and greater, all the words of God obey it. Well known in the sacred Scriptures are the examples of Moses and Joshua, and that which James (5:17) particularly mentions of Elijah, whom he expressly calls æotoäns, a man subject to like infirmities with ourselves, that he might illustrate the admirable force of prayer, by the common and human weakness of the person by whom it was offered. And that Christian legion under Antonius is well known and justly celebrated, which for the singular ardour and efficacy of its prayers, obtained the name of keraunoboloz, the thundering legion. Robert Leighton, D.D., Archbishop of Glasgow, 1611 - 1684.