Charles H. Spurgeon on Psalms 14:1

" They are corrupt, they have done abominable things: there is none that doeth good." "Men," says Bernard, "because they are corrupt in their minds, become abominable in their doings: corrupt before God, abominable before men. There are three sorts of men of which none doeth good. There are those who neither understand nor seek God, and they are the dead: there are others who understand him, but seek him not, and they are the wicked. There are others that seek him but understand him not, and they are the fools." "O God," cries a writer of the middle ages, "how many are here at this day who, under the name of Christianity, worship idols, and are abominable both to thee and to men! For every man worships that which he most loves. The proud man bows down before the idol of worldly power; the covetous man before the idol of money; the adulterer before the idol of beauty; and so of the rest." And of such, saith the apostle, "They profess that they know God, but in works deny him, being abominable and disobedient, and unto every good work reprobate." Titus 1:16. "There is none that doeth good." Notice how Paul avails himself of this testimony of the psalmist, among those which he heaps together in the third chapter of the epistle to the Romans, where he is proving concerning "both Jews and Gentiles, that they are all under sin." Romans 3:9. John Mason Neale, in loc.