Try not to do that, especially when I ask you to discuss the significance of a key opposition. Very often when one reflects upon a key binary opposition in a text one is heading for the heart of the text. To understand the poem, you need to understand the significance of the contrast between the major opposed players. Students who did reasonably well on this, by the way, often went on to write persuasive essays on the poem as a whole. Yes, but not in a Woody Allen or Saturday Night Live laugh out loud way.
Explications go further than that.
Organic unity entails significance, not simply action. Through Garuda, the mysterious surgeons, and the lobotomy, Snodgrass demonstrates an institution's desire to assimilate and defeat individuality before it threatens that instititution's way of life.