1. criticizes the subject for his half-baked knowledge
The metaphor “like a hawk encumber’d with his hood” indicate that there are things he does not know, he is blinded and cannot really grasp what he teaches.
2. criticizes the subject for confusing his audience
The subject could not deliver his promises because his words are unintelligible to the audience.
3. criticizes the subject for having abundant knowledge of the world but low self awareness
The last line makes the quote self-explanatory.
