The church teaches that homosexual behavior has always been a grievous sin.

Which led me into a grievous sin that I have to explain to you.

Some insisted that apostasy, even under threat of death, and other grievous sins cut one off forever from the Church.

The Church also teaches that, once formed, not to have followed my conscience would have been a serious, grievous sin.

Well into the 19th century, taking one's own life was considered a grievous sin.

It would have been a grievous sin if I had killed you then.

"Good, but I'm looking for the most grievous sin of all."

If a person commits the grievous sin of using a thinking machine, he shall be put to death.

Can you imagine that I would even dream of risking so grievous a sin for so small a cause?

There could be no deep, grievous sin on her young soul.