The law holds with equal sureness for all right action. Love, and you shall be loved. All love is mathematically just, as much as the two sides of an algebraic equation.
Emerson presents love as an example of what he sees as a wider moral law of compensation. Just as actions produce corresponding consequences, he argues that giving affection and goodwill tends to create conditions in which affection can be returned. His comparison with an algebraic equation emphasises the regularity and balance he believes operate in human conduct.
Within Compensation, the statement reflects Emerson’s broader claim that moral actions contain their own forms of return. The idea should not be read as a literal guarantee that every act of love will be reciprocated by the same person or in equal measure. Rather, Emerson uses mathematical language metaphorically to suggest that generosity, care and good conduct have consequences that extend beyond the immediate act. The quotation therefore links love with reciprocity and presents ethical behaviour as part of an underlying balance between what people give and what they receive.