| Quote #1
altar, sword, and pen,
"Pen" here stands in for literature on the whole – Wordsworth puts literature up there as one of England's great traditions, along with things as important as religion and military might.
| Quote #2
Thou hadst a voice whose sound was like the sea:
Here, Wordsworth means Milton's poetic voice. The wild, natural imagery of these lines emphasize the tremendous power and vast scope of Milton's work.