ἀλλήλων τὰ βάρη βαστάζετε, καὶ οὕτως ἀναπληρώσετε τὸν νόμον τοῦ Χριστοῦ → bear each other's burdens, and in that way fulfill the anointed King's Law (Galatians 6:2)
compulsory: P. βίαιος, P. and V. ἀναγκαῖος.
cogent: P. and V. πιθανός, P. ἀναγκαῖος (Thuc. 4, 60).
firm, strong: Met., P. ἰσχυρός.