By analysing the title the intelligent reader can suddentrly wander who the blidness refears to. The test is a petrarchian sonnet, made up of one octave, in which the poet present his problem, and one sestet, in which the poet gives himself an answer. The passage from the octave to the sestet is underlined by a full stop.
The poet couldn't serve God well, and therefore he couldn't exploit his Talents. In the first part he wanders what God would have done if he worked less than one who can see, and then he relized that if he had given his best, he would have been pardoned.
The test refears to the Talent of Parabola, the center of Puritanism .
There are a lot of retorical figures : personification of Patience, alliterations and metaphors in which the light is compared to a sight, and a day labour is compared to work in life .