Contradiction with 1 Timothy 1:10
This verse includes those who "enslave" as contrary to sound doctrine, while Philemon 1:10 advocates for Onesimus, a slave, to be accepted back without addressing the issue of slavery.
1 Timothy 1:10: For whoremongers, for them that defile themselves with mankind, for menstealers, for liars, for perjured persons, and if there be any other thing that is contrary to sound doctrine;
Contradiction with Ephesians 6:5
This verse instructs slaves to obey their masters, which contrasts with Philemon 1:10's appeal for Onesimus to be accepted as a brother rather than a slave.
Ephesians 6:5: Servants, be obedient to them that are [your] masters according to the flesh, with fear and trembling, in singleness of your heart, as unto Christ;
Contradiction with Colossians 3:22
Advises slaves to obey their masters in all things, seemingly contradicting the spirit of Philemon 1:10, which pleads for Onesimus's acceptance and implies a change in relationship dynamics.
Colossians 3:22: Servants, obey in all things [your] masters according to the flesh; not with eyeservice, as menpleasers; but in singleness of heart, fearing God: