The epistle reading for Trinity Sunday begins with the conclusion. Romans 11:33-36 forms the concluding thought of the section beginning in Romans 9. Liturgically speaking, the emphasis is on the nature and attributes of God, which come into focus on Trinity Sunday. However, understanding Paul’s point here means first having a clearer picture of the context.
Why did some out of Israel believe while many continued to reject the Gospel? Paul addresses this very question throughout Romans 9-11. They had the promises and were sons of Israel according to the flesh. If anyone on earth should have believed, it was them, yet they rejected Christ. Had the promise failed? Was the Word of God null and void? Of course not! “For not all who are descended from Israel belong to Israel” (Romans 9:6). Being one of the sons of Israel is a matter of faith, not flesh.
Yet if it is a matter of faith, then God, and not man, makes one a part of the great congregation. “I will have mercy on whom I have mercy, and I will have compassion on whom I have compassion. So then it depends not on human will or exertion, but on God, who has mercy” (Romans 9:15-16). It is God’s action, not ours, that creates faith. It is God’s action, not ours, that sustains faith. God freely elects, freely chooses, those who belong to Him. Salvation is of the Lord from beginning to end, apart from any human considerations.
However, the Gentiles, who did not have the promise, have come to believe in the promise. “What shall we say, then? That Gentiles who did not pursue righteousness have attained it, that is, a righteousness that is by faith; but that Israel who pursued a law that would lead to righteousness did not succeed in reaching that law. Why? Because they did not pursue it by faith, but as if it were based on works” (Romans 9:30-32). The Gentiles have been grafted into the living tree.
Israel has been hardened because of sin. Their hardening means that the Gospel goes out to the Gentiles (Romans 11:25). Israel stumbles in sin so that the Gentiles would be brought in. Paul himself rebuked the Jews for the hardness of heart, saying “It was necessary that the word of God be spoken first to you. Since you thrust it aside and judge yourselves unworthy of eternal life, behold, we are turning to the Gentiles” (Acts 13:46; see also Acts 18:6). Through God’s perfect Providence, the evil of Israel’s sin turns into a great good for the Gentiles, because now they hear the preaching of the Gospel.
Yet the mercy shown to the Gentiles is meant to call Israel back from their hardening. “They too have now been disobedient in order that by the mercy shown to you they also may now receive mercy” (Acts 11:31). Israel according to the flesh becomes jealous when strangers occupy their promised inheritance. Because of their jealousy, they will turn from their wickedness and seek after the promise according to faith, called from death back to life.
Paul’s conclusion, the reading for Trinity, therefore emphasizes the glory and the mystery of God’s providence in the world. God controls all things, and this perfect control also means that He uses what are dark and mysterious paths to us to accomplish His goals. What men mean for evil, God intends for good, bringing about the salvation of His elect without fail. Even though Israel stumbles from their own sin, God intends it to be salvation for the Gentiles. Even though the Gentiles walked in darkness from their own sin, God intends it to be salvation for the Jews. “For from Him and through Him and to Him are all things. To be Him be glory forever. Amen” (Romans 11:36)!