ISB ~ Titus 1 v15

To the pure:Reads like a response to the “Jewish” propaganda in the preceding verse (1:14). If so, perhaps troublemakers were promoting the dietary distinctions between clean and unclean foods (Lev 11:1-47) as well as the non-biblical laws of purity formulated within Pharisaic Judaism (compare the “commands of men” in Tit 1:14 with Mk 7:1-8). Paul insists, however, that because Christians are themselves purified (Tit 2:14), they are not bound to follow the purity legislation of the Old Covenant or of Jewish tradition in general (Acts 10:15; Rom 14:14). Notice that Paul is addressing a misunderstanding about ritual purity and defilement; he is not saying that believers are immune to the pollution of sin.