Cataphatic theology, from the Greek for affirmation, speaks of God through positive attributes: God is good, God is powerful, God is loving. Apophatic theology, the way of negation, holds that God so exceeds any category available to finite language that the truer approach is to say what God is not, God is not limited, not divisible, not comprehensible by reason, treating even the most exalted positive statement as ultimately inadequate to its object. The two are not simply rival methods so much as two moments most major theological traditions hold together: cataphatic language gives believers something to affirm and worship, while apophatic language guards against mistaking any human concept, however exalted, for the reality of God itself.
Jewish, Christian and Islamic theology each developed sophisticated apophatic strands, from Maimonides' insistence that positive attributes applied to God can only be understood negatively, to Christian mystical theology's cloud of unknowing, to the Islamic tanzih, the declaration of God's transcendence above any comparison. Indian thought offers a structurally similar move in the Upanishadic formula neti neti, not this, not this, applied to Brahman.