The invulnerable mind

The Stoics seem to think that the mind is invulnerable, in contrast to the body.  The body can be harmed, but it is not a problem because you retain your ability to reason, and to act correctly.  From what I've read, Stoics seem to set the mind apart from the body.

Stoicism is an early philosophy, and so can't really be faulted for not knowing what we in modern times know: there is no mind that is distinct from the body.  Brain trauma can alter our memories and even our personality (sometimes in a good way).  Our mind is more important than the body, sure.  But it's also likely to have problems, and then Stoic wisdom will not come in handy, because we have lost our ability to think rationally.

Marcus Aurelius writes:

You are a little soul, bearing about a corpse.

But actually, it's more like we're just a corpse.