Otherness cannot be a form. For to alter is to deform rather than to form. Therefore, that which is seen in different things can also be seen in and of itself without otherness, since otherness did not give being to it.
Nicholas of CusaAn external thing that is knowable [is knowable] by means of something internal that is consubstantial [with the rational soul].
Nicholas of CusaThe rational is apprehended through the intellect, however, the intellect is not found in the region of the rational; the intellect is as the eye and the rational as the colors.
Nicholas of CusaEvery angle acknowledges that it is a likeness of true angularity, for [each angle] is angle not insofar as angle exists in itself but insofar as angle exists in something else, viz., in a surface. And so, true angularity is present in creatable and depictable angles as in a likeness of itself.
Nicholas of Cusa