Romans 14:5 - Coke's Commentary on the Holy Bible

One man esteemeth one day, &c.— The Apostle having, in the foregoing verse, used the phrase κρινων αλλοτριον οικετην, for judging any one to be or not to be another man's servant,—seems here to continue the use of the word τρινειν in the same signification; that is, for judging a day to be more particularly God's. Critics have observed, that the word πληροφορεισθω, rendered fully persuaded, is most properly applied to a ship, which is carried on by the wind and tide with all its sails spread to forward it, and nothing to obstruct its course. So that the meaning is, "Let him go on in his own way, without impediment:—let every man enjoy his own sentiments freely in these things." See Raphelius, Doddridge, and Bennet's Appendix to his Irenicum, p. 120, &c.