The Bible, our world around us and through sermons.
.Catholic Answer
God reveals Himself most fully and completely in Our Blessed Lord:.
from The Catechism of the Catholic Church, second edition, English translation 1994561 "The whole of Christ's life was a continual teaching: his silences, his miracles, his gestures, his prayer, his love for people, his special affection for the little and the poor, his acceptance of the total sacrifice on the Cross for the redemption of the world, and his Resurrection are the actualization of his word and the fulfillment of Revelation" (John Paul II, Catechesi tradendae 9)
His revelation of Himself through Our Blessed Lord is mediated both through Sacred Scripture and Tradition: 81 "Sacred Scripture is the speech of God as it is put down in writing under the breath of the Holy Spirit." (Dei Verbum 9) "And [Holy] Tradition transmits in its entirety the Word of God which has been entrusted to the apostles by Christ the Lord and the Holy Spirit. It transmits it to the successors of the apostles so that, enlightened by the Spirit of truth, they may faithfully preserve, expound, and spread it abroad by their preaching." (Dei Verbum 9)
By reading about Gods Divine Revelation
died
Qu'ran
bible/ scripture
bible/ scripture
Revelation.
Because it is the first sign that he is a prophet and that he is gods messenger
Epistles
The book of the Revelation of Jesus Christ to St. John, which is the last book in the New Testament.
The covenant with Noah. God choosing Abraham. God Forms his people of Israel. Gods revelation in Jesus christ.
Revelation 2:1-29; Revelation 3: 1-22.
You will find the answer to this question in the book REVELATION IN CONTEXT by Irene Belyeu. She deals with the literary, linguistic, cultural and historical context of the Book of Revelation.