The philosophy of Plotino represents, with respect to Parmenides -although in dependency of him-, a new way to think the relations between Unity and Thought. Whereas Parmenides maintains that being is the only object adapted to thought, Plotino considers that it is not possible to think without the distinction between intelligible contents. Consequently, thinking cannot be the highest. But, although in this sense he surpasses to Parmenides, his forgetfulness of some Aristotelian contributions prevenís him to extract all potentialities contained in his discovery.