The Ongoing Reconstrual Of Experience

Halliday & Matthiessen (1999: 618):

… the ontogenetic perspective shows that in fact our experience is being ongoingly reconstrued and recategorised as we grow from infancy to maturity. This is the outcome of processes taking place in human history — evolutionary events that are at once both material and semiotic, and that cannot be reduced to either purely physical processes driven by technology or purely discursive processes driven by ideology.

Interpersonal Significance Of Ideational Metaphor

Halliday & Matthiessen (1999: 242):

But the interpersonal significance of grammatical metaphor is likely to be felt most clearly at the macroscopic level, in the overall pattern of interpersonal relationships, and the ideological orientation, that emerge over the course of a text.