"The most powerful prayer," Eckhart wrote, "almost powerful enough to make God almighty, is to be free of self-will." This emptying creates space for divine presence. When the soul becomes completely detached, it returns to its ground in God, where distinctions between self and divine dissolve.
Eckhart's teaching went beyond conventional piety. He argued that clinging even to God-concepts obstructs the immediate experience of the divine. True prayer is not petition but receptivity; genuine virtue acts without calculation or even consciousness of virtue.
His sermons employed shocking paradoxes: "The eye with which I see God is the same eye with which God sees me." Such statements led to his condemnation by papal bull in 1329, though his influence persisted through Christian mysticism and resonated with later thinkers from Hegel to Heidegger.
Source
Sermons and Treatises - Meister Eckhart