III. RELATIVE CLAUSES EXPRESSING PURPOSE.
317. Relative Clauses of Pure Purpose. Relative clauses expressing purpose take the Future Indicative both in classical and New Testament Greek. HA. 911; G. 1442; B. p. 229; WM. p. 386, f. n.Matt. 21:41; to.n avmpelw/na evkdw,setai a;lloij gewrgoi/j( oi[tinej avpodw,sousin auvtw/| tou.j karpou.j, he will let out the vineyard unto other husbandmen, which shall render him the fruits. See also Acts 6:3.318. Complementary relative clauses expressing that for which a person or thing is fitted, or other similar relation, take the Subjunctive or the Future Indicative both in classical and New Testament Greek. G.MT. 572; Hale in T.A.P.A. 1893, pp. 156 ff.Heb. 8:3; o[qen avnagkai/on e;cein ti kai. tou/ton o] prosene,gkh|, wherefore it is necessary that this high priest also have somewhat to offer. See also Mark 14:14; Luke 11:6; 22:11. In Luke 7:4 a complementary relative clause limiting the adjective a;xioj has the Future Indicative.319.The clauses referred to in 318 are to be distinguished from true relative clauses of purpose in that they do not express the purpose with which the action denoted by the principal clause is done, but constitute a complementary limitation of the principal clause. Cf. the clause with i[na (215-217) and the Infinitive (368) expressing a similar relation.
The Subjunctive in such clauses is probably in origin a Deliberative Subjunctive. Thus in Mark 14:14, pou/ evstin to. kata,luma, mou o[pou to. pa,sca meta. tw/n maqhtw/n mou fa,gw, the relative clause o[pou/ . . . fa,gw reproduces in dependent construction the thought of the deliberative question pou/ . . . fa,gw. The same explanation doubtless applies, though less obviously, to the Subjunctive in Acts 21:16, and to the Future in Luke 7:4. In both instances the thought of a deliberative question is reproduced in the relative clause. Cf. the clauses similar in force, but employing an interrogative pronoun, 346. See Tarbell in Cl. Rev. July 1891, p. 302 (contra, Earle in Cl. Rev. March 1892, pp. 93-95); Hale in T.A.P.A., 1893.
320. The Optative sometimes occurs after a past tense in these deliberative relative clauses in classical Greek. There are, however, no New Testament instances of the Optative so used.