Halliday & Matthiessen (1999: 134-5):
The grammatical reactances for the figure types include:Directionality of process: many mental processes are typically bidirectional, appearing in two opposite configurations (I like it/ it pleases me; cf. detest/revolt; fear/frighten; remember/remind, notice/strike). It is thus possible to construe conscious processing either as the Phenomenon impinging on the Senser's consciousness (the music pleases him) or as the Senser's consciousness having the Phenomenon as its domain (he likes the music). Neither material nor relational clauses display this dual directionality.