Sloth

"Sloth is not, as many think, simple laziness (although that is usually a side-effect). Instead, it is a sadness about the good set before us, a boredom with the things of God, a failure to respond with the proper repentance, joy, zeal or love to God's works and goodness. Sloth is a spiritual "ho-hum" or "whatever" in the face of Christ crucified. Once this spiritual languor sets in, we can easily become lazy louts — because we see no reason to make an effort." --Fr. Scalia