A great poem in World Literature, Dakshinamurti Stotra reveals the Poet and the Mystic in Sri Sankaracarya in unison at the highest altitude of his being.
True religion is not talk, or doctrines, or theories, nor is it sectarianism. It is the relation between soul and God. Religion does not consist in erecting temples, or building churches, or attending public worship. It is not to be found in books, or in words, or in lectures, or in organizations. Religion consists in realization. We must realize God, feel God, see God, talk to God. That is religion.
-Swami Vivekananda