and shatter the holy arke of the Church, not born upon their shoulders with pains and labour in the word, but drawne with rude oxen their officials, and their owne brute inventions.
This would be referring to Milton's take on the church making rules for itself, without the consent of Biblical scripture.
discipline is not only the removall of disorder, but if any visible shape can be given to divine things, the very visible shape and image of vertue, whereby she is not only seene in the regular gestures and motions of her heavenly paces as she walkes, but also makes the harmony of her voice audible to mortall eares.
This rings true
Sweet Bird that shunn'st the noise of folly, Most musicall, most melancholy!
In "L'Allegro," I chose a quote with a Raven being mentioned. This stuck out to me that Milton mentions yet again a bird making a bird call.
Wher brooding darknes spreads his jealous wings, And the night-Raven sings;
This creates some dark imagery, and is followed up by a creature we can easily imagine. Dark, evil chuckling Raven!