Eternal sin
In Christian hamartiology, eternal sins, unforgivable sins, or unpardonable sins are sins which will not be forgiven by God. One eternal or unforgivable sin (blasphemy against the Holy Spirit) is specified in several passages of the Synoptic Gospels, including , , and .
Seven deadly sins
Pope Gregory combined this with "tristitia" into sloth for his list. When Thomas Aquinas described "acedia" in his interpretation of the list, he described it as an "uneasiness of the mind", being a progenitor for lesser sins such as restlessness and instability. Dante refined this definition further, describing acedia as the "failure to love God with all one's heart, all one's mind and all one's soul"; to him it was the "middle sin", the only one characterised by an absence or insufficiency of love. Some scholars have said that the ultimate form of acedia was despair which leads to suicide.