English summary: At the age of 94, Marcel Conche still has something to say about nature, the infinite, truth, tradition, creation, the self, silence, the tragic, love, death and mathematics, not to mention Heraclitus, Descartes, Kant, Leibniz and, primarily, Spinoza. French description: A quatre-vingt-quatorze ans, Marcel Conche a encore quelque chose a dire sur la nature, l'infini, la verite, la tradition, la creation, le moi, le silence, le tragique, l'amour, la mort ou les mathematiques, mais aussi sur Heraclite, Descartes, Kant, Leibniz et, principalement, sur Spinoza.