What does Isaiah 25:6 mean?

The prophet Isaiah sang praise to the Lord. He honored God, who used His might to judge the earth and remove all those who oppose Him and His chosen people (Isaiah 25:1–5). Now Isaiah describes the banquet that will take place when the King Messiah takes the throne of Israel. This is when the Lord begins to reign directly over the whole world. This fits well with the final verse of the previous chapter (Isaiah 24:23). After the time of judgment, the era of celebration and peacefulness on the earth will begin.

It was typical for kings to begin their reign with a celebration. This would usually include a feast and the giving of gifts. The Lord of Hosts holds this inaugural feast on a mountain. Given the context, this is probably Mount Zion: the site of Jerusalem. The feast is prepared for all peoples as the God of the Israelites becomes the King of all nations. Everyone joyfully acknowledges that the faith of the Jewish people was right all along. Their God is the one true God and King.

The meal includes only the best of foods, rich meats, and the most highly desirable of wine. This verse is part of the overall Biblical message regarding alcohol. Simplified, to be drunk is a sin (Ephesians 5:18), but alcohol is not a sin in and of itself. In fact, the word translated "feast" is mist󠄓ēh', which was so strongly connected with the idea of drinking wine that it is sometimes translated specifically as "drinking." The references to wines are translated from the root word semer, plus adjective which imply "old wine:" an aged, fully fermented, strongly alcoholic beverage. This is "fine wine," filtered, deliberately aged, and strained. God Himself is said to provide a mist󠄓ēh' featuring semer: a feast including alcohol-containing wines.