For the similarities, both poets portray that true love starts 'freely' or else it would be forced or impure. Furthermore, they both express love or measure it in a spiritual way. Elizabeth first describes her way of loving using a spatial metaphor: as her love extends to the "depth" and "breadth" and "height" that her soul can "reach." Whereas Shakespeare claims that love is measurable to 'some degree', which indicates love's actual worth cannot be known.
Elizabeth perceives love in