How we cite our quotes: (Line)
Quote #4
Wherefore each part
Of my hard heart
Meets in this frame
To praise thy name (9-12)
The poem's religious or devotional bent is made very clear here, especially in the rhyme on "frame" and "name." The "frame" is both the poem itself and the speaker's body, and the fact that the word rhymes with "name" tells us that God is a very big part of both.
Quote #5
That if I chance to hold my peace,
These stones to praise thee may not cease (13-14)
The speaker has figured out a way to praise God even if something happens to him: the poem will be his surrogate. It will ensure that he continues to spread the good word even after he's no longer able to talk (i.e., after he's dead).
Quote #6
Oh, let thy blessed SACRIFCE be mine,
And sanctify this ALTAR to be thine (15-16)
The speaker wants to make his altar a religious offering. The thing is, the altar is both the poem and the speaker's offering of himself. He's built the poem-heart-altar with God in mind, and now he wants God to bless it and make it a sacred, spiritual, object.