called - effectually, not merely externally. The “unto,” or into,” seems to express this: not merely invited to (Greek, “epi”), but called INTO, so as to be partakers of (Greek, “eis”); compare 1Co 1:9.
marriage supper - Greek, “the supper of the marriage.” Typified by the Lord’s Supper.
true - Greek, “genuine”; veritable sayings which shall surely be fulfilled, namely, all the previous revelations.