The can must be so sweet, the crust
So fresh that come in fasts divine!
Nostrils, your careless breath that spend
Upon the stir and keep of pride,
What relish shall the censers send
Along the sanctuary side!
O feel-of-primrose hands, O feet
That want the yield of plushy sward,
But you shall walk the golden street
And you unhouse and house the Lord.
And, Poverty, be thou the bride
And now the marriage feast begun,
And lily-coloured clothes provide
Your spouse not laboured-at nor spun.
Recalls the famous  Consider the Lilies  passage in the New Testament, where Jesus tells his disciples that God will provide for them as He provides for the lilies, so don’t stress about things. A comforting message for the impoverished Jesuit monk. 
 
 Second, according to  this woman , lilies connote virginity (hence, traditional white wedding dresses) and celibacy within marriage, which Hopkins likened to his own celibate union with Jesus Christ. I don’t know if I buy this reading. But the criticism she does is pretty meticulous.