What does Psalm 33:11 mean?

What God purposes to do, He will do, without any possibility of failure. He chose Israel as His special people (Deuteronomy 7:6) and promised to make them a great nation (Genesis 12:1–2; 22:15–19). Antagonistic people and nations throughout the centuries have tried to annihilate the Jewish people. Yet, the Jews are still alive and living in part of the Promised Land as a nation. Even the captivity of Judah by Babylon did not overturn God's plan for Israel. He promised in Jeremiah 29:10 that after seventy years He would bring His people out of Babylon and restore them in their own land. He said His plans for them were for welfare and not for evil, to give them a future and a hope (Jeremiah 29:11).

God's long-term plan for Israel is to restore her fortunes and gather her from all the nations and all the places into which they have been scattered (Jeremiah 29:14; Amos 9:11–15; Zechariah 13:1; 14:1–16; Romans 11:25–27). This was at least partially fulfilled in 1948, when the long-exiled Jewish people established the modern nation of Israel. Complete fulfillment of these prophecies awaits the end times.