Charles H. Spurgeon on Psalms 25:3

Let them be ashamed which transgress without cause. All persons who transgress, do it, in some sense, without cause; since they cannot excuse of justify their conduct. God is so amiable and excellent in every part of his great name, that he deserves our constant reverence and love. His law is so holy, just, and good, and all his precepts concerning all things so righteous and calculated to make us happy, that the mouth of every transgressor must be stopped. Hence we must all be covered with shame, if dealt with according to our deserts, for all have sinned. But since God has promised to be merciful to those who truly repent, and unfeignedly believe his holy gospel, shame will be the portion of those only who wilfully persist in their wickedness, and refuse to return to God by Jesus Christ. These then are the persons whom the psalmist speaks of as transgressing without cause, and doubtless these have no cloak for their sin. William Richardson, 1825.