"The rapid path of light sources" or "The training course for enlightened agents."
Most likely, you are referring to (The Course of Light), a concept in theology and philosophy regarding the nature of angels and time. Alternatively, you might be referring to the "Cursus Luminarum" (Course of the Luminaries/Celestial Bodies), referring to ancient astronomy. cursus luminar
"The movement of an angel is not successive, but instantaneous... This is similar to the way light arrives from the sun to the earth." — Summa Theologica, I, Q. 53, Art. 2 "The rapid path of light sources" or "The
In the context of learning, the "Course of Light" represents the transmission of knowledge. Just as the Scholastics imagined angels moving instantly by the application of will, true understanding often strikes us not as a slow accumulation of data, but as a sudden flash of insight—an "aha" moment where the light simply arrives . This is similar to the way light arrives