Sentence:  [S]ince the <WSD>happy</WSD> are sufficient to themselves they have no need of friends; and hence it is said, "When Fortune's goods abound, what boots a friend?" Thus then it appears that the <WSD>happy</WSD> do not require friends. 
Meaning of the word marked with <WSD> tags:  "preceded by" '''(the)''': happy people as a group.