The apprehending of a value and the attitude appropriate to it mutually require one another, and while the required attitude is not being experienced, the value isn't being apprehended completely vividly. So in a certain way it's correct to say that love is based upon the apprehended value of the beloved person, but on the other hand, the worth of a person is fully and completely accessible only to the lover.
She adds a footnote:
Consider the parallel with religious experience. "In trust we experience a community which in itself is the highest knowledge of that which we trust." Theodor Haering, Der christliche Glaube: Dogmatik (Stuttgart: Verlag der Vereinsbuchhandlung, 1912, p. 160).
[Edith Stein, "Individual and Community", Philosophy of Psychology and the Humanities, Baseheart & Sawicki, trs. ICS Publications (Washington, DC: 2000), p. 213.]