In so far as, by adding a construction, I can bring to light the properties of a triangle, and yet find that the figure thus transformed does not cease to be the same figure as I began with, and in so far, moreover, as I am able to effect a synthesis retaining the character of necessity, this is not because my construction is upheld by a concept of the triangle in which all its properties are included, or because, starting from perceptual consciousness, I arrive at the eidos: it is because I perform the synthesis of the new property by means of my body, which immediately implants me in space, while its autonomous motion enables me, through a series of definite procedures, to arrive once more at an all inclusive view of space.