We all have giants to fight. Every form of sin is such a giant. We can only succeed in this warfare by following David's example. The brook, to which we must go for our pebbles, is the word of God. Every portion of truth from this word is a pebble for our use in this warfare. When Jesus, the Captain of our salvation, went forth into the wilderness, to be tempted of Satan, he was fighting the great father of all the giants. He fought and conquered him with pebbles from this brook. And if we seek the help of God, to enable us to use these pebbles, as our blessed master did, we shall be successful as he was." - from the Author's Preface