Pavis, Performance Analysis and Perception

Upon reading Pavis’ ‘Analyzing Performance’ (p. 24: “theater lovers capable of feeling and understanding the sensations and movements of their own bodies, […] the bodies of performers […] as an auto-bio-graphy in its true sense…”; italics not mine) I wonder: How do we get there? Is practice (i.e. constant exposure to various forms of performance) enough? Do you need to train yourself to “perceiv[e] ‘thought-in-action'”? It cannot depend upon the often referred to suspension of disbelief for as soon as one is aware of it, one does not employ it anymore and yet I can consciously enjoy a performance, whole-heartedly as well as ‘whole-bodied’. How?