* * * * *
The Apostle seeks to establish, in the first place, _the fixedness of the Abrahamic covenant_. This is the main purport of the passage. At the same time, in ver. 16, he brings into view _the Object of the covenant_, the person designated by it--_Christ_, its proper Heir. This consideration, though stated here parenthetically, lies at the basis of the settlement made with Abraham; its importance is made manifest by the after course of Paul's exposition.
At this point, where the discussion opens out into its larger proportions, we observe that the sharp tone of personal feeling with which the chapter commenced has disappeared. In ver. 15 the writer drops into a conciliatory key. He seems to forget the wounded Apostle in the theologian and instructor in Christ. "Brethren," he says, "I speak in human fashion--I put this matter in a way that every one will understand." He lifts himself above the Galatian quarrel, and from the height of his argument addresses himself to the common intelligence of mankind.
But is it _covenant_, or _testament_, that the Apostle intends here? "I speak after the manner of men," he continues; "if the case were that of a man's διαθήκη, once ratified, no one would set it aside, or add to it." The presumption is that the word is employed in its accepted, every-day significance. And that unquestionably was "testament." It would never occur to an ordinary Greek reader to interpret the expression otherwise. Philo and Josephus, the representatives of contemporary Hellenistic usage, read this term, in the Old Testament, with the connotation of διαθήκη in current Greek.[90] The context of this passage is in harmony with their usage. The "covenant" of ver. 15 corresponds to "the blessing of Abraham," and "the promise of the Spirit" in the two preceding verses. Again in ver. 17, "promise" and "covenant" are synonymous. Now a "covenant of promise" amounts to a "testament." It is the _prospective_ nature of the covenant, the bond which it creates between Abraham and the Gentiles, which the Apostle has been insisting on ever since ver. 6. It belongs "to Abraham and to his seed"; it comes by way of "gift" and "grace" (vv. 18, 22); it invests those taking part in it with "sonship" and rights of "inheritance" (vv. 18, 26, 29, etc.) These ideas cluster round the thought of _a testament_; they are not inherent in _covenant_, strictly considered. Even in the Old Testament this latter designation fails to convey all that belongs to the Divine engagements there recorded. In a covenant the two parties are conceived as equals in point of law, binding themselves by a compact that bears on each alike. Here it is not so. The disposition of affairs is made by God, who in the sovereignty of His grace "hath granted it to Abraham." It was surely a reverent sense of this difference which dictated to the men of the Septuagint the use of διαθήκη rather than συνθήκη, the ordinary term for _covenant_ or _compact_, in their rendering of the Hebrew _berith_.
[90] See the able and convincing elucidation of διαθήκη in Cremer's _Biblico-Theological Lexicon of N.T. Greek_.
This aspect of the covenants now becomes their commanding feature. Our Lord's employment of this word at the Last Supper gave it the affecting reference to His death which it has conveyed ever since to the Christian mind.[91] The Latin translators were guided by a true instinct when in the Scriptures of the New Covenant they wrote _testamentum_ everywhere, not _fœdus_ or _pactum_, for this word. The testament is a covenant--and something more. The testator designates his heir, and binds himself to grant to him at the predetermined time (ch. iv. 2) the specified boon, which it remains for the beneficiary simply to accept. Such a Divine _testament_ has come down from Abraham to his Gentile sons.
[91] See Heb. ix. 16-18, where so much ingenuity has been expended to turn _testament_ into _covenant_.