Society, in general. In essence, Shakespeare aims to say we are all just pretending in front of other people, like a facade. We will have our moments and our downs. The “one man pays many parts” can be how a person can pretend to be something they are not to get others to like them. Like trying to fit in one group, you’ll pretend to be into what they are or etc. Can be applied in the dating scene, friendships, work and other forms of social life.
The function of the infinitive phrase in the sentence <em>To win a marathon is my goal </em>is object of the verb.
It is definitely an object, and it would follow a verb if it were a normal ordering of words in the sentence (My goal is to win a marathon), and since it is not preceded by a preposition, it cannot be object of the preposition, but of a verb.
The comma goes after Abwni