On their own, human beings cannot perceive God's being and nature or God's reign and will. Nevertheless, God does not conceal Himself, but rather reveals Himself to mankind.
His revelation is a declaration of divine nature, divine truth, and divine will, and is to be seen as a sign of God's love and care for mankind.
When we speak of God's "self-revelation" we understand that God grants human beings insights into His nature. God thereby makes Himself known as the Creator of heaven and earth, the Deliverer of Israel, the Reconciler of mankind, and the Maker of the new creation. However, this revelation is not only a self-revelation and expression of the divine will, but also an encounter which God grants human beings in word and sacrament.