Let us imagine a biofeedback machine where the three principles of mechanics are expressed in an alternative but quantitatively equivalent form, as in Weber’s force law (1846): instead of inertia, there is a zero sum of forces; instead of a constant force, the intensity of force depends on the environment; instead of simultaneity of action and reaction, there is a «retarded potential» and thus an internal, proper time of the system. The first remarkable difference between these principles and the more familiar ones is that they allow, to a certain extent, the interpolation of consciousness within its framework. The second is that it applies equally to point and extended bodies or events, rendering unnecessary crucial artifices supporting special relativity, general relativity, or quantum mechanics and making them incompatible with each other. The third is that it makes possible a conception of time different from those of physics and psychology.