For Revelation you should understand the Orthodox Scriptures of the great fundamental traditions. Great fundamental traditions are those that transmit the Teachings of the Races-Roots.
The Teaching of an Orthodox Scripture must be based on antiquity and affirmation.
These are fundamental definitions in Theology: Theology is the Only Truth; Theology is a Divine Knowledge taught directly by God; and the object of Theology is to discover to Man the Divine Knowledge and his relationship with God.
A student of Theology should use the knowledge of several philosophies. He prepares himself to know the Truth, or Theology, by reflecting on philosophies, by reasoning, by discrepancy, and by inter-relating his theses.
Dogma is a Truth deduced, or a Mystery, because generally man is unable to understand the Truth as Great Initiates and their disciples understand this Truth: “Clare Visa in Deo”.
Natural reason can investigate a little by itself about Divine Mysteries.
A man knows God in a nominal way, but his reason, through constant and fervent desire of investigating the nature of God, may have a confuse knowledge in its magnetic mental field.
The Non-Manifested One does not admit definition or refusal, because by refusing or affirming it, one would establish a differential tenet, even in its Absolute aspect, and this cannot be.
The Divine Manifestation is the Absolute Principle of the Universe. Usually it is named God, or HES. God is His own essence and existence, and He alone knows Himself. “Ego sum qui sum” (“I am who I am”).
Necessarily, one must believe in a personal God, Analogical Contrariety of the Impersonal One.
Of course, the existence of God cannot be proved a priori, since we only have a nominal knowledge about God.
Masters of Theology have divided the concept of Creation into two great theories, since certain Masters teach that the Universe co-exists with God and is eternal as God; and others teach that the Universe has been created by God, not from the Eternity, but in tempore, in the time.
In His Manifestation, God is an Absolute, Eternal and Unknowable Principle. In trying to explain the Divine Trinity, one does not reflect about how, when or why the differentiation has been made and the Non-Manifested One has become Manifested.