The Mass in B minor is a well which never runs dry; we return to it year after year, and this time to celebrate Easter Monday we jump into the splendid "Sanctus" section. Christian uses the fugue subject on the text "Pleni sunt coeli et terra gloria ejus" (heaven and earth are full of thy glory) to describe one of the best text paintings in history. This blossoming motif doesn't just leap to heaven and fall to earth; it then covers over and under both of them with the glory (gloria) of God. 

"Pleni sunt coeli..." fugue section of the "Sanctus," Mass in B minor as performed by the Netherlands Bach Society