John Trapp on Isaiah 1:25

Ver. 25. And I will turn my hand upon thee] So Zech. 13.] I will turn my hand upon the little ones; ſo ſoon doth it repent the Lord concerning his ſervants. Here he mitigateth the former fearful menace, and promiſeth a Reformation.

And purily purge away thy droſs] Et expurgabo, ut purificativum, ſcorias tuas. The wicked are the droſs of the State, Pſal. 119.119. and wickedneſs is the droſs and dregs of the ſoul Prov. 17.3. & 27.21. God promiſeth her to purge out both, to ſeparate the precious from the vile; to reform & refine all: a Metaphor from Metallaries.

And I will take away all thy tinne] 1. Thine Hypocriſie: for tinne hath a ſhew of ſilver, but tis not ſo, nay it is a deadly enemy to gold & ſilver, ſaith One, making them hard and brittle.Diod. It is alſo a Tyrant over them and will hardly be ſeparated from them. Hereby are figured your moſt noted, rooted, and inveterate ſins.