The Sanctus, which is the liturgy of Isaiah 6 and Revelation 4:8, calls us away from earth, and all earthly cares, to "fix our minds on the things that are above, and not the things below" (Col. 3).

I don't know if anything in Divine Worship expresses this better than the Cherubic Hymn of the St. John Chrysostom Liturgy. Please enjoy this  article which explains things more eloquently than I can.