But of the sky, as it is perceived or sensed, subtended by my gaze which ranges over and resides in it, and providing as it does the theatre of a certain living pulsation adopted by my body, it can be said that it exists for itself, in the sense that it is not made up of mutually exclusive parts, that each part of the whole is 'sensitive' to what happens in all the others, and 'knows them dynamically'.