Those who preach the living word of the living God can move people to do great things, as demonstrated when the Jews returned from Babylonian captivity. They became discouraged after having started to rebuild the temple, because of their enemies. Yet, the Lord used two prophets to move the people,

Then Tattenai, governor of the region beyond the River, Shethar-boznai, and their companions diligently did according to what King Darius had sent. So the elders of the Jews built, and they prospered through the prophesying of Haggai the prophet and Zechariah the son of Iddo. And they built and finished it, according to the commandment of the God of Israel, and according to the command of Cyrus, Darius, and Artaxerxes king of Persia. Now the temple was finished on the third day of the month of Adar, which was in the sixth year of the reign of King Darius (Ezra 6:13–15).

If you preach, do not quit. If you listen to preaching, discern what the Lord wants you to do and do it.