The answer is: In a dream

Matt 2:13 - The angel only appeared to Joseph in a dream and didn't actually visit them in a physical sense. Also the angel appeared only to Joseph and not to them both.

The story of the warning in a dream carries deep layers of significance tied into the larger narrative of Jesus' early life. In Matthew 2:13-15, it’s revealed that God often communicates in unexpected ways. Joseph’s dreaming revelation is one of the many moments highlighting how divine guidance can come through personal experiences, particularly at pivotal junctions.

Dreams have long been portrayed in scripture as a channel for heavenly messages. Think back to figures like Joseph in Genesis, who interpreted Pharaoh's dreams, or Daniel, who revealed crucial truths in dream interpretations. Such instances create an intriguing thread connecting various biblical narratives, showing that God can reach out to lead people during uncertainty.

It's also essential to note the specific individual addressed in this angelic intervention. By choosing to approach Joseph, the betrothed husband, the text acknowledges the significance of paternal figures in the nurturing of the Holy Child. This dynamic emphasizes metaphoric themes of trust, responsibility, and proactive action all encapsulated within the dream experience.

Furthermore, geographically, this event portrays profound historical significance. Fleeing to Egypt reflects not only safety measures; it’s a poignant echo of Israel's own past in captivity and their subsequent liberation. It's this weaving of sacred history into personal narrative that enhances its enduring resonance through generations, reminding readers similarly to be alert to the various ways guidance and intrigue can enter our lives!