In the book "Apollyon" by Jennifer L. Armentrout, the phrase "Eíste pánta mou" translates to "You are my everything," expressing a deep emotional connection between characters. This quote encapsulates the essence of love and devotion, highlighting how one person can become the center of another's universe. It signifies the profound impact that relationships can have, emphasizing themes of loyalty and sacrifice.

The significance of this quote illustrates the intensity of feelings the characters experience, driving the narrative forward. Such expressions of affection often serve as pivotal moments in literature, showcasing the strength of bonds formed in the face of challenges. Armentrout masterfully intertwines these themes within her story, creating an engaging journey that resonates with readers on a personal level.