What does vices of excess and vices of deficiency mean

The vice of excess is irascibility or irritableness, of deficiency is spinelessness or passivity (there's not a good word for it). Truthfulness – is what Aristotle called moderation in one's presentation of oneself, with boastfulness as the excess and self-deprecation as the deficiency.

Explanation:

The vice of excess is irascibility or irritableness, of deficiency is spiritlessness or passivity (there's not a good word for it). Truthfulness – is what Aristotle called moderation in one's presentation of oneself, with boastfulness as the excess and self-deprecation as the deficiency.

Explanation:

using the scientific method.