My impression about 'one and one make one eleven' had to do with Kundalini and third-eye opening... that is, singular focus and meditation opens the way for spiritual enlightenment, or full third-eye opening. Meditation on the point between the eyes is a typical Kundalini focal point. 1 and 1 make 111 (two eyes lead to the three eyes, kind of). There are a lot of references to the third-eye chakra in the album art and lyrics of Aenima and Lateralus.