The central place of Plato’s Timaeus in Plotinus’ Enneads has long been acknowledged. However, the importance of Timaeus 90 a for Plotinus’ psychology and theory of Intellect has not until now been properly recognized. This paper argues that, in Plato’s Timaeus 90 a, Plotinus sees his own distinction between the Hypostasis Intellect and human intellect, that is, our higher soul, which Plato in the Timaeus calls a daimon and which Plotinus takes to remain in the intelligible realm, interpreting it along (...) the same lines as “our allotted guardian spirit” (Ennead III.4). The way Timaeus 90 a is combined with passages drawn from other Platonic dialogues as well as with Peripatetic doctrine provides the framework for a case study on how Plotinus handles and interprets Platonic material. (shrink)