 The views on the continuum of Nicolaus Cusanus (1401–64), a champion of the actual infinite, are of considerable interest. In his De Mente Idiotae of 1450, he asserts that any continuum, be it geometric, perceptual, or physical, is divisible in two senses, the one ideal, the other actual. Ideal division “progresses to infinity”; actual division terminates in atoms after finitely many steps (see Stones 1928: 447).