“Epiphany. 3 a (1) : a usually sudden manifestation or perception of the essential nature or meaning of something (2) : an intuitive grasp of reality through something (as an event) usually simple and striking (3) : an illuminating discovery, realization, or disclosure b : a revealing scene or moment”
via Epiphany – Definition and More from the Free Merriam-Webster Dictionary.
And the essential nature and meaning, the grasp of reality through something simple and striking, the illuminating discovery, realization, and disclosure is Jesus: God in the flesh for you.
And thus the time of Epiphany in the church year, which begins today, marking when the Wise Men had their epiphany, and continues to celebrate the other epiphanies of Jesus described in the Bible (when His identity was revealed at His baptism, His first miracle, and on and on through His transfiguration).