My vineyard, which is mine, is before me: thou, O Solomon, must have a thousand, and those that keep the fruit thereof two hundred.

Wesley's Notes

8:12 My vineyard - My church, which is here opposed to Solomon's vineyard. Possibly we may ascribe the first clause to Christ, and the latter to the spouse: such interlocutions being familiar in this book. Mine - This repetition is very emphatical, to shew that Christ had a more eminent title to his vineyard, the church, than Solomon had to his vineyard, because it was purchased not by his money, but by his blood. Before me - Is under my own eye and care. Thou - These words are the church's return to Christ, who is here called Solomon, as he was chap.3:9, 11, as elsewhere he is called David. Dost thou, O Christ, keep thine own vineyard, which Solomon did not? Then surely it is meet that thou shouldst receive as large a revenue from thy vineyard, as he did from his. Two hundred - Though the chief revenue is justly given to thee, yet thy ministers, who serve thee in thy vineyard, are allowed by thee to receive some encouragement for their service.

Jamieson-Fausset-Brown Bible Commentary

12. "mine" by grant of the true Solomon. Not merely "let out to keepers," as in the Jewish dispensation of works, but "mine" by grace. This is "before me," that is, in my power [Maurer]. But though no longer under constraint of "keeping" the law as a mere letter and covenant of works, love to Jesus Christ will constrain her the more freely to render all to Solomon (Ro 8:2-4; 1Co 6:20; Ga 5:13; 1Pe 2:16), after having paid what justice and His will require should be paid to others (1Co 7:29-31; 9:14). "Before me" may also mean "I will never lose sight of it" (contrast So 1:6) [Moody Stuart]. She will not keep it for herself, though so freely given to her, but for His use and glory (Lu 19:13; Ro 6:15; 14:7-9; 1Co 12:7). Or the "two hundred" may mean a double tithe (two-tenths of the whole paid back by Jesus Christ) as the reward of grace for our surrender of all (the thousand) to Him (Ga 6:7; Heb 6:10); then she and "those that keep" are the same [Adelaide Newton]. But Jesus Christ pays back not merely two tithes, but His all for our all (1Co 3:21-23).

Matthew Henry's Concise Commentary

8:8-12 The church pleads for the Gentiles, who then had not the word of God, nor the means of grace. Those who are brought to Christ themselves, should contrive what they may do to help others to him. Babes in Christ are always seen among Christians, and the welfare of their weak brethren is an object of continual prayer with the stronger believers. If the beginning of this work were likened to a wall built upon Him the precious Foundation and Corner-stone, then the Gentile church would become as a palace for the great King, built of solid silver. If the first preaching of the gospel were as the making a door through the wall of partition, that door should be lasting, as cased with boards of durable cedar. She shall be carefully and effectually protected, enclosed so as to receive no damage. The church is full of care for those yet uncalled. Christ says, I will do all that is necessary to be done for them. See with what satisfaction we should look back upon the times and seasons, when we were in his eyes as those that find favour. Our hearts are our vineyards, which we must keep with all diligence. To Christ, and to his praise, all our fruits must be dedicated. All that work for Christ, work for themselves, and shall be unspeakable gainers by it.