is sloth stronger than the vice?

the marketing teacher may be right when he states that people would quit smoking if there was only one place in this city where one could buy a pack of cigarrettes (as if lisbon wasn't already a hell). we may then die old and healthy and with our lungs in one piece, but in the end we'd be rounded up in hell for a mortal sin. we burn for falling into the vice or to stay out of it due to sloth. double bind anyone?