Final answer:
The lines by Francis Quarles follow an 'aabb' rhyme scheme, where the first and second lines rhyme, as do the third and fourth lines.
Step-by-step explanation:
The rhyme scheme of the presented lines by Francis Quarles is 'aabb.' This can be determined by analyzing the end words of each line. 'Eyes' rhymes with 'sure,' which corresponds to 'a,' and 'keeps' rhymes with 'sleeps,' which corresponds to 'b.' Thus, the pattern for these lines follows the 'aabb' structure. A rhyme scheme is a poet's deliberate pattern of lines that rhyme with other lines in a poem or a stanza. The rhyme schemes can vary depending on the specific stanzaic form or structure chosen by the poet.