The ocean of impediment of all karmas
Is produced from one's false imagination.
Should one wish to repent it
Let him sit upright and mediate on the true aspect [of reality].
All sins are just as frost and dew,
So wisdom's sun can disperse them.
Therefore with entire devotion
Let him repent of his six sense organs.
The Sutra of Meditation on the Bodhisattva Universal Virtue (translated by Kojiro Miyasaka with revisions by Pier P. Del Campana), The Threefold Lotus Sutra, pp 365-6.