The practice of Humility - 4

Have always impressed upon your spirit the memory of your past sins.  Be convinced that the sin of pride is such an abominable evil that it is unsurpassed by any other on earth or within hell.  This was the sin which caused the fall of the angels in heaven into the abyss; this was the sin which corrupted the entire human race and drove upon the earth the infinite crowd of evils which will last as long as the world, or rather as long as eternity.
Moreover, a soul loaded with sins is only worthy of hatred, contempt, torments; thus, see how much you can esteem yourself after having become guilty of so many sins.

J. Pecci (later Pope Leo XIII)