A Catholic Pope decided what the deadly sins are not God or the old Testament, therefore they are not old testament sins. Since Jesus died so all our sins are forgiven, then the 7 deadly sins are not deadly, they are forgiven also, except maybe suicide, because you can't be forgiven for a sin til you actually sin, so if you kill yourself that's a deadly sin and unforgivable. Since all our sins are forgiven by the Sacrifice of Christ on the cross, there can be no deadly sin, if your a Christian.
All sins are deadly? Really? I don't see shoplifters being struck by a bolt of lightning as they try to make their escape. Unless, you mean that everyone sins, and everyone dies eventually. In which case, God is a cruel, sick person, and he makes people want to sin (it's human nature), and then kills people for sinning. Sort of like a kid who cuts off an ant's antennae to watch it squirm. Of course, God would be far more sociopathic than that, as he's dealing with intelligent life, and inflicting emotional and mental pain on top of physical pain
And God killed thousands of times more good people than Satan in the BIble
Man, when you really think about it, God's an asshole >_>
If a sin is defined as a morally unprincipled act, then yes. But "deadly" would mean you'll go to hell.
Since I believe heaven and hell are here and now, I choose not to sin so I can stay living here in heaven. I am not perfect and God knows it, so He often lets me slide.