About meetings with people who participated or are participating in the creation of new centers for the crystallization of discoveries. About meetings with ideas that have moved or are ready to move the frozen block of unresolved problems, who have untied the first knot in a tangled tangle of contradictions. About meetings with realized, sensational discoveries and with modest results, accumulating day after day and causing a premonition of impending changes or the hope of an explosion of insights. I will try to talk about only a few discoveries in this book.