alterius non sit qui suus esse potest
Let no man belong to another that can belong to himself

Final sentence from Aesop ascribed fable (see also Aesop's Fables) "The Frogs Who Desired a King" as appears in the collection commonly known as the "Anonymus Neveleti" (fable XXIb. De ranis a Iove querentibus regem). Motto of Paracelsus. Usually attributed to Cicero.