John Trapp on Zephaniah 3:14

Verſe 14. Sing O daughter of Zion, ſhot O Iſrael: Ioy is the juſt mans portion, which the wicked may not meddle with Hoſ. 9.1. In the tranſgreſſion of an evill man there is a ſnare or a cord to ſtrangle his joy with, to cheek and choke all his comforts, but the righteous ſing and rejoyce Prov. 29.6. they are commanded ſo to do: yea the command is doubled and trebbled here and elſewhere in both Teſtaments: and it is a ſin for ſuch not to rejoyce, as well as not to repent.

be glad and rejoyce with all the heart] which no wicked man can do: his mith is but the hypocriſy of mirth: like a little counterfeit complexion. It may ſmooth the face, never cheer up the heart: like a ſlight daſh of raine that ſoaketh not to the root: or a handfull of bruſh wood or ſeare thorns under the pot Eccleſ. 7.6. As their humiliations are but skin-deep, they rent-their garments and not their hearts, they grieve in the face, and not in the heart Mat. 6.16. ſo do they rejoyce in the face, and not with all their heart 2 Cor. 5.12.