What is the speaker's tone in "Sonnet 75" by Edmund Spenser?

The tone of the speaker in Edmund Spenser’s “Sonnet 75” is optimistic and romantic. The speaker writes the name of his ladylove twice in the sand, only to see the waves wash it away. Instead of admitting his love will “decay," though, the speaker promises his verse will eternalize her.

Spenser’s sonnet cycle, the “Amoretti,” largely concerns itself with the love of a lady. In “Sonnet 75,” the voice of this lady questions the speaker’s attempt to immortalize such "a mortal thing" as her name. In an almost practical voice, the speaker dismisses her concerns. He concludes that through his verse, she “shall live by fame" and their “love shall live, and later life renew.”