Why is john's symbol an eagle?

John's symbol as an eagle represents spiritual elevation and divine insight. In Christian tradition, the eagle signifies the ability to soar above earthly concerns and offers a connection between the divine and the human realm. This imagery aligns with the themes of John's writings, which emphasize a higher understanding of Jesus' nature and mission. The eagle's association with the heavens underscores John's focus on the divine Word and eternal truths.