I will never forget thy precepts,.... Not the precepts of the moral law, though he carefully observed and attended to them, laid them up in his mind, and did not forget to keep them; but the doctrines of the word, of the word which the Lord commanded to a thousand generations; these he endeavoured to remember, and not let them slip from him, since it follows: for with them thou hast quickened me: not with the precepts of the moral law, which cannot give life, quicken a dead sinner, nor comfort a distressed saint it is the killing letter, and the ministration of condemnation and death: but the doctrines of the word, of the Gospel, which are spirit and life; the savour of life unto life, the means of quickening dead sinners, and of reviving drooping saints; of refreshing their spirits, and cheering their souls, when in distress: and when they are made thus useful, they are not easily forgotten, they leave impressions which do not soon wear off; and besides, saints are careful to remember such words and truths, which have been of use unto them, since they may have occasion for them again.