 The two most prominent features of the Stoic account of the soul are these: first, the soul is corporeal; second, the adult human soul is rational (in the sense that all its operations involve the use of reason) and one (psychological monism). Although Seneca appreciates Platonic imagery that presents the soul as ‘loftier’ than bodily things, he is fully committed to the Stoic view that the soul is a body. Discussion of this issue is, to his mind, somewhat academic, and thus not as salutary as the elevating themes about virtue that he often prefers. But Letter 106 explains why we must think of the soul as a body. Only bodies act on anything, cause effects; therefore, the soul must be a body (cf. Letter 117 on the good being a body).