Bittul, Hebrew for nullification or self abnegation, names an ideal developed with particular precision in Chabad Hasidic thought, most systematically in the Tanya, the foundational work of the movement's founder, Shneur Zalman of Liadi. Bittul describes the practice and inner state of setting aside one's sense of independent selfhood before God, recognizing, as a matter of contemplative realization rather than mere humility, that the self has no existence apart from the divine life that continuously sustains it.
Chabad teaching distinguishes bittul ha-yesh, the nullification of one's sense of substantial, independent existence while that existence remains, from the more radical bittul be-metzius, nullification of existence itself, a distinction that matters because Chabad theology, following the strict monism associated with wahdat al-wujud in the Islamic context, holds that created reality has no being independent of God at all, a claim in tension with, and much debated against, more conventional theistic accounts of a genuinely distinct creation. Bittul is cultivated through meditation on Chabad's intellectual system, which gives the movement its name, an acronym for wisdom, understanding and knowledge, treating sustained contemplation as the route to the emotional and volitional state of self nullification rather than as an end in itself.