According to Wikipedia, " More than other sins, the definition of sloth has changed considerably since its original inclusion among the seven deadly sins. In fact it was first called the sin of sadness or despair."
Um, I've taken Zoloft for the last seven years, do I have to say anything else to show my classical bona fides for this original meaning of sloth? I hope not, because it sounds like a lot of work, and, also according to Wikipedia, "Current interpretations... portray sloth as being more simply a sin of laziness or indifference, of an unwillingness to act, an unwillingness to care rather than a failure to love God and his works."
I don't want to brag, sin number seven, and the root of all other sins, but if I was any more slothful, I'd be hanging upside down from a branch eating leaves.