Where can we especially witness the powerful effect of the doctrine of Christ?

Though chosen from among the poor, the simple, and the uneducated, the holy Apostles conquered the world for Christ. By the power of the Gospel, they subdued the mighty, the wise, and the rich, even kings and their kingdoms, not by human wisdom or strength, but by the grace of God. The rulers of the Jews themselves marveled, perceiving that they were “uneducated, common men,” and “that these two men had been with Jesus” (Act 4:13; see Q221). Thus was fulfilled the word of the Apostle Paul: “God chose what is foolish in the world to shame the wise; God chose what is weak in the world to shame the strong… so that no flesh might boast in the presence of God” (1Co 1:27–29).

In this we see the boundless power of Christ, who works mightily through the humble and reveals that the true strength of the Church lies not in worldly power, but in the presence and wisdom of the Holy Spirit.