Je viens de tomber sur cette métaphore dans un livre de Chogyam Trungpa, qui s’intitule Shambhala, The Sacred Path of the Warrior. Dans cet extrait, il parle de l’absence de doute, non pas celle des intégristes ou des fanatiques religieux, par exemple, mais celle qui traduit une confiance en soi, par le synchronisme du corps et de l’esprit. (en anglais)

« Synchronizing mind and body is not a concept or a random technique someone thought up for self-improvement. Rather, it is a basic principle of how to be a human being and how to use your sense perceptions, your mind, and your body together. The body can be likened to a camera, and the mind to the film inside the camera. The question is how you can use them together. When the aperture and the shutter speed of the camera are properly set in relation to the speed of the film inside the camera, then you can take good, accurate photographs, because you have synchronised the camera and the film. Similarly, when mind and body are properly synchronised, then you have a clear perception and you have a sense of being without doubt, being without the tremors and the shaking and the short-sightedness of anxiety, wich make your behavior totally inaccurate. »