Soo this was a stunning opportunity to out-geek even myself. Descartes' Meditations on First Philosophy: totally reasonable thing to embody in nail art, right? ... Right? Well, it seemed especially appropriate since I started my French class tonight!
So this design focuses on the ball of wax example from the second Meditation. It features little René snug in his bed, a candle (mostly to indicate what colour the ball of wax is), "SUM" from the famed Cogito Ergo Sum (on its own, "sum" is simply the first person singular of the verb "to be," so, just "I am"), and the ball of wax itself.
All were painted on a base of Joe Fresh Fog, with a number of other shades and blends painted on top of the outlines I sketched in with OPI Alpine Snow.