Nicolas Malebranche was a French Oratorian Catholic priest and rationalist philosopher. In his works, he sought to synthesize the thought of St. Augustine and Descartes, in order to demonstrate the active role of God in every aspect of the world. Malebranche is best known for his doctrines of vision in God, occasionalism and ontologism.

The Congregation of the Oratory of Jesus and Mary Immaculate, best known as the French Oratory, is a society of apostolic life of Catholic priests founded in 1611 in Paris, France, by Pierre de Bérulle (1575–1629), later a cardinal of the Catholic Church. They are known as Bérullians or Oratorians. The French Oratory had a determinant influence on the French school of spirituality throughout the 17th century. It is separate and distinct from the Oratory of Saint Philip Neri, which served as its inspiration.