The Genius in lines 12 and 16 MOST likely refers to fate.
Fate
Explanation:
The poem “Fate” clarifies that an individual's life is completely constrained by destiny or fate as we call it and otherworldly powers or more noteworthy creatures control a person's life regardless. In which the line "The genius from its cloudly Throne & Is the same genius that creates" alludes to fate (Genius).
No living being can comprehend the idea of destiny and how destiny turns the occasions for an individual or against him. In this sonnet, the creator clarifies the inconceivability of people controlling their destinies.
He discusses heavenly powers who direct individuals' fates, and that people can just quiet submission to it. Regardless of if life closes with fortunate or unfortunate fortune, individuals can just keep living with it.
