Charles H. Spurgeon on Psalms 16:2

"My goodness extendeth not to thee." Oh, how great is God's goodness to you! He calls upon others for the same things, and conscience stands as Pharaoh's taskmasters, requiring the tale of bricks but not allowing straw; it impels and presseth, but gives no enlargement of heart, and buffets and wounds them for neglect: as the hard creditor that, taking the poor debtor by the throat, saith, "Pay me that thou owest me," but yields him no power to do it; thus God might deal with you also, for he oweth not assistance to us; but we owe obedience to him. Remember, we had power, and it is just to demand what we cannot do, because the weakness that is in us is of ourselves: we have impoverished ourselves. Therefore, when in much mercy he puts forth his hand into the work with thee, be very thankful. If the work be not done, he is no loser; if done, and well done, he is no gainer. Job 22:2; 35:6-8. But the gain is all to thee; all the good that comes by it is to thyself. —Joseph Symonds, 1639.

Verse 2 (last clause). It is a greater glory to us that we are allowed to serve God, than it is to him that we offer him that service. He is not rendered happy by us; but we are made happy by him. He can do without such earthly servants; but we cannot do without such a heavenly Master. —William Secker.

Verse 2 (last clause). There is nothing added to God; he is so perfect, that no sin can hurt him; and so righteous, that no righteousness can benefit him. O Lord, my righteousness extendeth not to thee! thou hast no need of my righteousness. Acts 17:24, 25. God hath no need of anything. —Richard Stock, 1641.