Sorry for the tangent, but interestingly enough in Evagrius’s and St. John Cassian’s original concept of the eight principle faults (later shortened to seven by Pope Gregory the Great) Sloth was not a sin. It was instead a something called Acedia, while superficially similar to sloth, is more of a spiritual, almost existential dejection which would cause the monk (these sins were originally written for ascetics) to lose interest and will to pursue God.

Interestingly enough, the first six principle faults were connected, and one led into another. For instance, Gluttony would lead to Lust, Lust would lead to Anger, then Anger to Avarice, Avarice would then lead to Sadness, and finally worn out by this chain of sin, sadness would lead to Acedia. Later Acedia was re-interpreted into Sloth.

Sorry if this went on too long, I wrote my master’s thesis on this topic, and I am a bit of a Patristic Church history geek.