Maturity - “Sonnet VII”
In “Sonnet VII” the speaker ruminates about his imminent manhood for time is “Stol’n on his wing my (the speaker’s) three-and twentieth year!” The speaker is conscious that after his twenty third birthdate, he will not be a juvenile, but he will be a full-fledged man. Boyish charm is a fleeting actuality that switches to manhood.
Blindness - Sonnet XIX
The speaker in “Sonnet XIX” sightless, thus he expends his days in obscurity. The impaired vision eclipses the speaker's existence to a level where the speaker becomes inquisitive about God's jurisdiction in the sightlessness.