Epiphany traditionally celebrates the universal dimensions of the coming of the Christ Child.
One of the most universal ways God is seen is through nature. However, nature in the past has often been mistaken for God, either by natural beings being worshiped as God or by nature as a whole taken to be God.
God has also been seen through moral introspection, where the yearning of the human will towards some sense of goodness has been taken to be inspired by a Supreme Being. Unfortunately, wrong and destructive actions obscure any sense of cosmic truth.
Sacrifices were also universal in early human cultures. These sacrifices were not normally considered revelatory as far as I can tell, but they did create contact with the deities.
Suspicions that sacrificial rites might be obscuring the truth of God appeared in many cultures, not least among the Jewish people whose prophets argued that both the sacrifices and even more injustice to society’s victims hid God from view.
Then there are those four odd documents that suggest that God has appeared in the form of a human being by actually being a human being. This person was born in obscurity, was not welcomed by the people, and died an ignominious death. While alive, this person was known to suggest that God can be seen in the lost, the rejected, and the forgotten.