Regardeth (pronei). "Thinks of," "esteems," "observes," "puts his mind on" (from prhn, mind). The Textus Receptus has also "he that regardeth not," but it is not genuine. Unto the Lord (kuriwi). Dative case. So as to twi qewi (unto God). He eats unto the Lord, he eats not unto the Lord. Paul's principle of freedom in non-essentials is most important. The Jewish Christians still observed the Seventh day (the Sabbath). The Gentile Christians were observing the first day of the week in honour of Christ's Resurrection on that day. Paul pleads for liberty.