70 Here, then, Venerable Brethren, is the noble origin of this dialogue: in the mind of God Himself. Religion of its very nature is a certain relationship between God and man. It finds its expression in prayer; and prayer is a dialogue. Revelation, too, that supernatural link which God has established with man, can likewise be looked upon as a dialogue. In the Incarnation and in the Gospel it is God's Word that speaks to us. That fatherly, sacred dialogue between God and man, broken off at the time of Adam's unhappy fall, has since, in the course of history, been restored. Indeed, the whole history of man's salvation is one long, varied dialogue, which marvelously begins with God and which He prolongs with men in so many different ways. In Christ's "conversation" (46) with men, God reveals something of Himself, of the mystery of His own life, of His own unique essence and trinity of persons. At the same time He tells us how He wishes to be known: as Love pure and simple; and how He wishes to be honored and served: His supreme commandment is love. Child and mystic, both are called to take part in this unfailing, trustful dialogue; and the mystic finds there the fullest scope for his spiritual powers.
Source: Ecclesiam Suam (Vatican.va)