It was Pride that changed angels into devils; it is humility that makes men as angels. - St. Augustine
The Sin of Pride is said by some to be the foremost of the Seven Deadly Sins. Hubris is the gateway through which all other sin enters the mortal soul.
What it is
Pride is excessive belief in one's own abilities, that interferes with the individual's recognition of the grace of God. It has been called the sin from which all others arise. Pride is also known as Vanity.
Why you do it
Well-meaning elementary school teachers told you to "believe in yourself."
Your punishment in Hell will be
You'll be broken on the wheel.
Associated symbols & such
Pride is linked with the horse and the color violet.
But remember this Pride goeth before the fall...