Aletheia Luna’s book, "Old Souls: The Sages and Mystics of Our World," explores the lives and teachings of influential figures throughout history and literature. It highlights individuals such as Helena Blavatsky, Kahlil Gibran, and Emily Dickinson, who have made significant contributions to spiritual thought and artistic expression. These figures are known for their profound insights into the human experience and consciousness, offering wisdom and inspiration to many. The inclusion of both modern and historical examples allows for a diverse understanding of mysticism and creativity.

The text also references contemporary personalities like Meryl Streep and Whoopi Goldberg, connecting the timeless themes of spirituality and creativity to modern culture. Luna’s exploration encourages readers to reflect on the legacies of these individuals, showcasing how their unique perspectives resonate across time and continue to inspire new generations. Writers and artists are depicted not only as creators but also as seekers of deeper truth, bridging the gap between the known and the unknown in their works.