The philosophy of Diogenes pays special attention to knowledge. Diogenes bases his thought on the well-known thesis of Parmenides which identifies einai and noein, combining it with the nous of Anaxagoras. According to Diogenes, the intellect (noesis) is embodied in the formal features of things and therefore is powerful, like the nous of Anaxagoras. The aim of the following pages is to show, in confrontation with Laks, that noesis does not homogenize the cosmos, but rather it diversifies it.