Adam Clarke on Joshua 24:16

God forbid that we should forsake the Lord - That they were now sincere cannot be reasonably doubted, for they served the Lord all the days of Joshua, and the elders that outlived him, Jos 24:31; but afterwards they turned aside, and did serve other gods. "It is ordinary," says Mr. Trapp, "for the many-headed multitude to turn with the stream - to be of the same religion with their superiors: thus at Rome, in Diocletian's time, they were pagans; in Constantine's Christians; in Constantius's, Arians; in Julian's apostates, and in Jovinian's, Christians again! And all this within less than the age of a man. It is, therefore, a good thing that the heart be established with grace."