He that is proud eats up himself. Pride is his own glass, his own trumpet, his own chronicle; and whatever praises itself but in the deed, devours the deed in the praise. ~ William ShakespearePride is said to be the ultimate sin. The sin from which all others are born. I've mulled over this for a while, and think that there may just be truth in that. Is it Pride that produces envy? Probably, since Pride mistakenly assumes its own innate importance, and superiority over others. How dare someone else have more than me? Know more than me? Is Pride the mother of lust? Lust really cares not for its object, only for itself. So I would say yes. And sloth? Slothful like slobs that don't care if their sloth rubs off on you? Sloth that ruins everything, even what is not yours to ruin? Wrath... your conviction that you and you alone are right, and therefore everyone else is wrong. And your ensuing anger. Greed is certainly the child of Pride. Wanting for yourself above all else. Believing that it is your right. And finally gluttony, maybe the most fluffy of the so-called sins. Is gluttony born of pride? That may be a stretch. Perhaps gluttony gone wild... gluttony that mows done everyone else.
I think Pride is considered to be the mother of all sins because it convinces those who suffer its burden that they are alone in their righteousness. Pride transformed into hubris is a most dangerous thing, as Oedipus knew well.
And Pride is at its most insidious and dangerous when it infects men of power. Men of power who are so convinced of their own mind, men who are even convinced that they have a direct line to God and God's will. Pride never heeds advice. Pride doesn't even hear it. Pride never has a moment of self doubt. Pride is ignorance at its apex. This purest Pride brings down others. Destroys peace.
That is Pride's ultimate evil.