Near the start of Chapter 22 in Howards End, it's said of Mr. Wilcox:
Amabat; amare timebat.
My edition has a footnote translating this as "He loved; he feared to love." And it also notes: "The source of this expression has not been identified."
Presumably that it even has a source is supposed by the editor to be implied by its being in Latin. But that may just be for effect.
A few minutes on Google have not helped me; they just turn up commentaries on this chapter. Have any of you scholarly folks read this phrase anywhere in classical literature?