Haggai 2

“For thus says the Lord of hosts: ‘Once more (it is a little while) I will shake heaven and earth, the sea and dry land; and I will shake all nations, and they shall come to the Desire of All Nations, and I will fill this temple with glory,’ says the Lord of hosts.  vv.6-7

Read chapter 2
The Jews have at this point just finished the rebuilding of the temple, yet they realize it is not as magnificent as it was before when Solomon first built it.  Yet the Lord is pleased with their hearts and desire directed to serving Him more than what they were able to do with their hands.  He encourages them with the promise that He will once more fill the temple with His glory, yet this is still waiting to come.  Once and for good the Lord will shake heaven and earth, sea and land, all nations that all will know the One True God.  He mentions this will be in a little while, yet to us over 2,500 years doesn't quite seem like a short time while we're still waiting.  Even if this meant for when Jesus became man that was still about 500 years after this prophesy.  Yet compared to eternity it will seem as nothing.
Notice this unique title of God: Desire of All Nations.  Christ is the longing of all nations whether they realize it now or not, they will when He is manifest to the world.  He will be the joy every longing heart seeks for.
Are you letting Christ fill the desires of your heart or do you have an unfulfilled longing that you're trying to gratify in other ways?