Here is, 1. David's appeal to God concerning his love to his precepts:
"Lord, thou knowest all things, thou knowest that I love them; consider
it then, and deal with me as thou usest to deal with those that love
thy word, which thou hast magnified above all thy name." He does not
say, "Consider how I fulfil thy precepts;" he was conscious to himself
that in many things he came short; but, "Consider how I love them." Our
obedience is pleasing to God, and pleasant to ourselves, only when it
comes from a principle of love. 2. His petition thereupon: "Quicken me,
to do my duty with vigour; revive me, keep me alive, not according to
any merit of mine, though I love thy word, but according to thy
lovingkindness;" to that we owe our lives, nay, that is better than
life itself. We need not desire to be quickened any further than God's
lovingkindness will quicken us.