There are lights which ascend and lights which descend. The ascending lights are the lights of the heart; the descending lights are those of the Throne. The false self is the veil between the Throne and the heart, like springs toward like. Light ascends toward light and light descends upon light, and "it is light upon light."
"It is better to put one's heart into one's prayer without finding the right words, than to find the right words without putting one's heart into them."