Helpful words from Worship Quote of the Week.  This is by Eric Alexander, composed a number of years before Piper’s Let the Nations Be Glad, but the same gist.

Worship and mission are so bound together in the economy of God that
you really cannot have one without the other. The reason for this is
that true worship is rendering to God the glory which is due his holy
name. And this is the great end and purpose for which all things exist.
God created the world as a theater in which to display his glory. He
created man and woman in order that they might reflect the image of his
glory. He sent Jesus in order that the glory of God might be seen in
the face of Jesus Christ. He redeemed sinners in order that they may be
changed into the image of his glory. There is nothing beyond this for
us: it is the terminus of everything in the universe. And that is why
worship is the highest employment of our faculties: it focuses on the
glory of God.

But when we come to know God, we discover that he is jealous for his
glory. He will not give it to another, nor his praise to graven images.
He desires his glory to be declared among the heathen (Psalm 96:3). Do
you see the logical corollary which must be drawn from these premises?
No Christian man or woman worshiping God and desiring his glory can be
unmoved by the fact that there are areas of the world and nations where
God is being robbed of his glory….The ultimate motive [for mission] is the glory of God.