This book brings together stories about the spiritual enlightenment experience of teachers from all eras and from spiritual traditions around the world: Christianity, Islam, Buddhism, Hinduism, Judaism, Bahá'í Faith, and so on. Beyond the diversity of its origins, contexts and trajectories, all the mystics, teachers, saints and sages that appear in these pages recognized having been surprised by happiness and had the feeling of having achieved -or savored- that much desired but that It escapes the vast majority of human beings: intense peace, extreme happiness and a deep understanding of the truth. Mystics, teachers and sages offer in this way a very broad perspective of spiritual awakening through the ages and, at the same time, it constitutes a powerful source of inspiration for each one to realize his own inner journey.