In this paper, we describe and classify the functions of se and sibi in Latin, according to a corpus made of Archaic and Classical Latin authors. We aim to demonstrate that the reflexive value is not the more widespread nor the original one. Instead, the reflexive value strengthens within time. We claim that the use of se and sibi unfolds from their function as long-distance anaphoric toward other functions. From essentially cognitive and functional frameworks, we explain the diachronic development of such functions from the Archaic toward the Classical period.