The paper discusses Hume's theories of causality and vice. According to Hum
e, the ontological status of necessity and vice can be compared to that of
the so-called secondary qualities, that is sounds, colours, heat, and cold,
which are not qualities in the object themselves, but perceptions in the m
ind. Just as necessity does not reside in the objects we consider, but in t
he mind that considers them, vice does not reside in actions or characters
we observe, but rather in ourselves who observe these actions or characters
.