the word setting is mostly syllabic (each syllable of the text is given it's own note), with some melismatic sections (like the word 'eternal').
word painting is used to make the music reflect the meaning of the words
most of the melody notes move in steps, with lots of passing notes (th notes in between chord notes)
there are lots of uses of ornaments (common to baroque music) in the right hand of the harpsichord and the soprano line, such as trills, appoggiaturas, grace notes and mordents
some of the text has been repeated, such as the word 'drop'
there are some descending sequences, such as in bar 20
rests are used to break up melodic phrases
the stepwise movement of the melody means it can be described as a 'conjunct' melody