When bioethics, by its multidisciplinary and pluralist nature, calls on many constitutive sources, moral and religious thought as philosophy find all the more their place that bioethics is a culture of discussion to make, if not emerge, less to reconstruct or adapt to their time, values whose history is linked to that of religions and philosophical trends. This brief text has only the interest of synthesizing this contribution in the light of what bioethics is today, a phenomenon in which everyone can find an anchor where, as in the labyrinth of Theseus, he will be able to find his way by following a guideline.