Charles H. Spurgeon on Psalms 119:11

When a godly man sues for a favour from God he should carefully use every means for obtaining it, and accordingly, as the Psalmist had asked to be preserved from wandering, he here shows us the holy precaution which he had taken to prevent his falling into sin.

Thy word have I hid in mine heart. His heart would be kept by the word because he kept the word in his heart. All that he had of the word written, and all that had been revealed to him by the voice of God, all, without exception, he had stored away in his affections, as a treasure to be preserved in a casket, or as a choice seed to be buried in a fruitful soil: what soil more fruitful than a renewed heart, wholly seeking the Lord? The word was God's own, and therefore precious to God's servant. He did not wear a text on his heart as a charm, but he hid it in his heart as a rule. He laid it up in the place of love and life, and it filled the chamber with sweetness and light. We must in this imitate David, copying his heart work as well as his outward character. First, we must mind that what we believe is truly God's word; that being done, we must hide or treasure it each man for himself; and we must see that this is done, not as a mere feat of the memory, but as the joyful act of the affections.

That I might not sin against thee. Here was the object aimed at. As one has well said, Here is the best thing "thy word"; hidden in the best place, "in my heart; "for the best of purposes, "that I might not sin against thee." This was done by the Psalmist with personal care, as a man carefully hides away his money when he fears thieves, in this case the thief dreaded was sin. Sinning "against God" is the believer's view of moral evil; other men care only when they offend against men. God's word is the best preventive against offending God, for it tells us his mind and will, and tends to bring our spirit into conformity with the divine Spirit. No cure for sin in the life is equal to the word in the seat of life, which is the heart. There is no hiding from sin unless we hide the truth in our souls.

A very pleasant variety of meaning is obtained by laying stress upon the words "thy" and "thee." He speaks to God, he loves the word because it is God's word, and he hates sin because it is sin against God himself. If he vexed others, he minded not so long as he did not offend his God. If we would not cause God displeasure we must treasure up his own word.

The personal way in which the man of God did this is also noteworthy: "With my whole heart have I sought thee." Whatever others might choose to do he had already made his choice and placed the Word in his innermost soul as his dearest delight, and however others might transgress, his aim was after holiness: "That I might not sin against thee." This was not what he purposed to do, but what he had already done: many are great at promising, but the Psalmist had been true in performing: hence he hoped to see a sure result. When the word is hidden in the heart the life shall be hidden from sin.

The parallelism between the second octave and the first is still continued. Psalms 119:3 speaks of doing no iniquity, while this verse treats of the method of not sinning. When we form an idea of a blessedly holy man (Psalms 119:3) it becomes us to make an earnest effort to attain unto the same sacred innocence and divine happiness, and this can only be through heart piety founded on the Scriptures.