Charles H. Spurgeon on Psalms 25:9

He will guide the poor in judgment. Never will this docility be found in any man, until the heart, which is naturally elated and filled with pride, has been humbled and subdued. As the Hebrew word denotes the poor or afflicted, and is employed in a metaphorical sense, to denote the meek and humble, it is probable that David, under this term, includes the afflictions which serve to restrain and subdue the frowardness of the flesh, as well as the grace of humility itself; as if he had said, When God has first humbled them, then he kindly stretches forth his hand to them, and leads and guides them throughout the whole course of their life. John Calvin.