People often enter our lives in mysterious ways. We have all met 'by accident' a person who crossed our path and radically altered our trajectory or opened a new door for us. Sometimes these encounters can even change the course of society. Where would psychology be without the meeting of Jung and Freud? Philosophy without the encounter of Sartre and Beauvoir? What predisposes us to such meetings? Who are these messengers that lead us to cross a new threshold? And why is it necessary to enter alone? Inspired by the Jungian concept of synchronicity and in the light of metaphors drawn from chaos theory, this book explores new avenues in understanding the intriguing question of synchronistic encounters.