Tenju Kyoju or “transforming heavy into light” is a term used in a number of Japanese Buddhist schools. Often understood as ‘lessening the effects of negative karma’, the presence of the Chinese character “chóng” meaning “repetition” suggests another sense, that of changing repeated negative patterns of thought, word and deed.
Habits can be hard to break. Deep seated thoughts are not easily dislodged. “Transforming heavy into light” is possible by cleaning up negative tendencies, habits and addictions. From a purely Buddhist point of view it is not altogether necessary to understand why we are compelled to repeat negative patterns, so much as it is to understand that we can stop it with the adoption of opposite behavior (pratiprak-sabhavana).
The Eastern spiritual traditions have developed many practices to effect the transformation of karmic tendencies. One aspect that is central to many of these practices is the taking of vows (vrata) which is said to form tendencies opposite to those ones that binds us to hard-to-eliminate negative thought patterns and habits.
If karma is dependent upon intention, then the patterns that produce negative karmic tendencies can be countered with the purest of all intentions: the vow to realize awakening for the sake of all living beings.
You who are accustomed to dwelling abroad in the marketplaces of destiny, seize firmly that highly priced jewel, the Thought of Awakening, so well-attested by all those with immeasurable minds . . . Whoever has committed the most dreadful evil may escape at once by taking refuge in this thought . . . This Thought of Awakening is to be understood as twofold: it is the idea of dedication to Awakening [bodhipranidhiccitta) and the actual pilgrimage towards it [bodhiprasthana].
Shantideva, Guide to the Bodhisattva Way of Life
It’s taught that the first instant in which a person conceives of the desirability of attaining awakening for the sake of others is identical with awakening itself. Of course, that should not be taken literally. It doesn’t end there. Once the thought has been produced, it is the subsequent determination to actualize the thought that nurtures the aspiration and sets in motion the conditions that make it possible for positive karmic tendencies to be strengthened and negative ones lessened.
The seeds of karmic potentialities reside deep within the consciousness, and it is from there, beginning with a new deep-seated thought pattern, bodhicitta, the thought of awakening, that we can “transform heavy into light.”
The sea of all karmic obstacles arises from illusions. If you wish to make amends for your past karma, sit upright and meditate on the true aspect of life, and all your offences will vanish like frost and dewdrops in the sunlight of enlightened wisdom.
Sutra of Meditation of the Bodhisattva Universal Virtue