John Trapp on Isaiah 1:5

Ver. 5. Why ſhould ye be ſtriken any more?] This was the heavieſt ſtroke that ever Judah felt from the hand of God; like as Ephraims ſoreſt Judgement was, He is joyned to Idols, let him alone, Hoſ. 4.17. q. d he is incorrigible, irreclaimable, let him go on and periſh: Ile not any longer foul my fingers with him. O fearful Sentence! To proſper in ſin is a grievous plague, and a ſign of one given up by God. To be like the Smiths-dog, whom neither the Hammers above him, nor the ſparks of fire falling round about him can awaken, is to be in a deſperate condition. To wax worſe by chaſtiſements, as 2 Chron. 28.22. is a ſure ſign of reprobate ſilver, Jerem. 6.30. of a dead and dedolent diſpoſition, Epheſ. 4.18. God as a loving Father, verba, verbera, beneficia, ſupplicia miſcuerat, had done all that could be done to do them good, but all would not do; ſuch was their obſtinacy.

The whole head is ſick, and the whole heart is faint] Head, Heart, Feet; Princes, Prieſts, and common people, as they had all ſinned, ſo they all had their payment: Sin is an univerſal ſickneſs, like thoſe Diſeaſes which Phyſitians ſay are Corruptio totius ſubſtantiae, a corruption of the whole ſubſtance. And National ſins bring National plagues, wherein all ſorts ſuffer, as they did in the dayes of Ahaz, de quibus haud dubie loquitur hic propheta, ſaith Scultetus: though others think the Prophet here ſpeaketh rather of thoſe miſeries inflicted upon Judah by Hazael King of Syria, 2 King. 12. and by Joaſh King of Iſrael, 2 King. 14. wherein all ſorts had their ſhare, none ſcaped ſcot-free.