Eternal sin
In Catholic teaching there are six sins that blaspheme against the Holy Spirit. They are: Several passages in the Bible are frequently interpreted as referring to the unforgivable sin:
Actual sin
In Roman Catholic theology, the "Capital vices" or sins, also known as the "seven deadly sins", are the main roots of sin. They are called capital sins not because they are the greatest sins or necessarily mortal sins, but because all sins are in some way related to at least one of them. These sins are: