O Light eternal, surpassing all created...

O Light eternal, surpassing all created brightness, flash forth the lightning from above and enlighten the inmost recesses of my heart. Cleanse, cheer, enlighten, and enliven my spirit with all its powers, that it may cling to you in ecstasies of joy. Oh, when will that happy and wished-for hour come, when you will fill me with your presence and become all in all to me? So long as this is not given me, my joy will not be complete. (c. 1418–1427)