A brayer is a thorny shrub and this image is visceral because even this plant, this piece of nature that Blake adores so much is used against him by the church to cause him agony.

荆种多刺灌木，这个形象发内心，为即使这种植物，这种布莱克如此崇然景观，也被教会用来对付他，给他带来痛苦。