It shall turn to you for a testimony - That is, it shall turn out on your part for a testimony to them (your persecutors) that you are thoroughly persuaded of the truth of what you teach, and that you are no impostors.

And it shall turn to you for a testimony. By this means they would have an opportunity of leaving their testimony for Christ before kings and rulers; and what they should meet with from them, would be a means of strengthening and confirming them in the truths of the Gospel; and be a proof and evidence to them of the certainty of the above things Christ had said should be accomplished; as well as be for a testimony against the rulers and governors, Jews, and Gentiles, before whom they should be convened; see Matthew 10:18.

It shall turn (ἀποβήσεται)

Lit., turn out; issue.

And it shall turn to you for {c} a testimony.

(c) This will be the result of your troubles and afflictions: they will be witnesses both before God and man of the treacherous and cruel dealing of your enemies, as well as of your steadfastness: A noble saying, that the afflictions of the godly and holy men pertain to the witness of the truth.

21:7-33 When shall these things be? This discourse to the disciples on the Overthrow of the Temple, Jerusalem, the Jewish Nation and the Second Coming of our Lord, is reported here, in Mt 24:3-31 and in Mr 13:4-37. Matthew's account is much the fullest, where see notes.

21:13 It shall turn to you for a testimony - Of your having delivered your own souls, and of their being without excuse.

13. for a testimony-an opportunity of bearing testimony.

21:5-28 With much curiosity those about Christ ask as to the time when the great desolation should be. He answers with clearness and fulness, as far as was necessary to teach them their duty; for all knowledge is desirable as far as it is in order to practice. Though spiritual judgements are the most common in gospel times, yet God makes use of temporal judgments also. Christ tells them what hard things they should suffer for his name's sake, and encourages them to bear up under their trials, and to go on in their work, notwithstanding the opposition they would meet with. God will stand by you, and own you, and assist you. This was remarkably fulfilled after the pouring out of the Spirit, by whom Christ gave his disciples wisdom and utterance. Though we may be losers for Christ, we shall not, we cannot be losers by him, in the end. It is our duty and interest at all times, especially in perilous, trying times, to secure the safety of our own souls. It is by Christian patience we keep possession of our own souls, and keep out all those impressions which would put us out of temper. We may view the prophecy before us much as those Old Testament prophecies, which, together with their great object, embrace, or glance at some nearer object of importance to the church. Having given an idea of the times for about thirty-eight years next to come, Christ shows what all those things would end in, namely, the destruction of Jerusalem, and the utter dispersion of the Jewish nation; which would be a type and figure of Christ's second coming. The scattered Jews around us preach the truth of Christianity; and prove, that though heaven and earth shall pass away, the words of Jesus shall not pass away. They also remind us to pray for those times when neither the real, nor the spiritual Jerusalem, shall any longer be trodden down by the Gentiles, and when both Jews and Gentiles shall be turned to the Lord. When Christ came to destroy the Jews, he came to redeem the Christians that were persecuted and oppressed by them; and then had the churches rest. When he comes to judge the world, he will redeem all that are his from their troubles. So fully did the Divine judgements come upon the Jews, that their city is set as an example before us, to show that sins will not pass unpunished; and that the terrors of the Lord, and his threatenings against impenitent sinners, will all come to pass, even as his word was true, and his wrath great upon Jerusalem.