Analysis of Draw on, Sweet Night

Draw on, Sweet Night, friend unto those cares
That do arise from painful melancholy.
My life so ill through want of comfort fares,
that unto thee I consecrate it wholly.
Sweet Night, draw on
My griefs when they be told to shades
and darkness find some ease from paining,
And while thou all in silence dost enfold,
I then shall have best time for my complaining.