THIS psalm is a description of the deplorable corruption by nature of every son of Adam, since the withering of that common root. Some restrain it to the Gentiles, as a wilderness full of briers and thorns, as not concerning the Jews, the garden of God, planted by his grace, and watered by the dew of heaven. But the apostle, the best interpreter, rectifies this in extending it by name to Jews, as well as Gentiles, (Rom. iii. 9). “We have before proved both Jews and Gentiles, that they are all under sin;” and (ver. 10‒12) cites part of this psalm and other passages of scripture for the further evidence of it, concluding by Jews and Gentiles, every person in the world naturally in this state of corruption. The psalmist first declares the corruption of the faculties of the soul, _The fool hath said in his heart_; secondly, the streams issuing from thence, _they are corrupt_, &c.: the first in atheistical principles, the other in unworthy practice; and lays all the evil, tyranny, lust, and persecutions by men, (as if the world were only for their sake) upon the neglects of God, and the atheism cherished in their hearts. _The fool_, a term in scripture signifying a wicked man, used also by the heathen philosophers to signify a vicious person, נבל as coming from נבל signifies the extinction of life in men, animals, and plants; so the word נבל is taken, a plant that hath lost all that juice that made it lovely and useful.[6] So a fool is one that hath lost his wisdom, and right notion of God and divine things which were communicated to man by creation; one dead in sin, yet one not so much void of rational faculties as of grace in those faculties, not one that wants reason, but abuses his reason. In Scripture the word signifies foolish.[7] _Said in his heart_; that is, he thinks, or he doubts, or he wishes. The thoughts of the heart are in the nature of words to God, though not to men. It is used in the like case of the atheistical person, (Ps. x. 11, 13), “He hath said in his heart, God hath forgotten; he hath said in his heart, Thou wilt not require it.” He doth not form a syllogism, as Calvin speaks, that there is no God: he dares not {a24} openly publish it, though he dares secretly think it. He cannot raze out the thoughts of a Deity, though he endeavors to blot those characters of God in his soul. He hath some doubts whether there be a God or no: he wishes there were not any, and sometimes hopes there is none at all. He could not so ascertain himself by convincing arguments to produce to the world, but he tampered with his own heart to bring it to that persuasion, and smothered in himself those notices of a Deity; which is so plain against the light of nature, that such a man may well be called a fool for it.