The texts included in this volume are articles written by Louis Lavelle for philosophy journals, communications at conferences, and lectures given at universities in France and abroad. Each of them presents, in summary, one of the essential themes of his doctrine: Spirit, Time, Self, the relationship between Spirit and the World, Essence and Existence, Participation. They span a period from 1936 to 1951, during which he co-directed, with René Le Senne, the collection “Philosophie de l’Esprit” (Philosophy of the Spirit). Through some texts in this volume, one can see the importance he attached to this series of works. It was also the period when he was writing his major work, “La Dialectique de l’éternel Présent” (The Dialectic of the Eternal Present), which was supposed to be crowned by a final part on Wisdom. He was not granted the time to write it. He was preparing it in his final meditations, and when he was invited to participate in the activities of the Society of Philosophy of Bordeaux in 1950, he chose as his subject: Wisdom as the science of spiritual life. It seemed to us that no text could be more suitable for the conclusion of this volume, which contains a summary of his entire doctrine and ends as his work was supposed to end, with the idea of wisdom where he saw the culmination of all philosophy.
—THE EDITORS.