Charles H. Spurgeon on Psalms 119:9

By taking heed, etc. I think the words may be better rendered and supplied thus, by observing what is according to thy word;which shows how a sinner is to be cleansed from his sins by the blood of Christ, and justified by his righteousness, and be clean through his word; and also how and by whom the work of sanctification is wrought in the heart, even by the Spirit of God, by means of the word, and what is the rule of a man's walk and conversation: he will find the word of God to be profitable, to inform in the doctrines of justification and pardon, to acquaint him with the nature of regeneration and sanctification; and for the correction and amendment of his life and manners, and for his instruction in every branch of manners: 2 Timothy 3:16. John Gill, 1697-1771.