Abstract
At the moment of his death, Jean Meslier not only bequeathed to posterity a Memoir in which he will openly declare his materialistic atheism, but also two letters addressed to the priests of his neighbourhood. In those letters, which can be read as a preface to his work, he urges his colleagues to undeceive themselves Christianity`s mistakes, unveil the mystery of inequity and enlighten their parishioners on the principles of good sense and the straight natural reason, issues that afterwards planted the seed of a future revolution. This is the first Spanish translation of the letters mentioned above and it is addressed to spread some of Meslier’s most unknown works.