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.

荆棘是一种灌木，这个形象是发自内心，为即使是这种植物，这种布莱崇拜自然景观，也被教会用来对付他，给他带来痛苦。