[quote="SHoJ, post:1, topic:300273"]
Suppose there is someone who works overnight Saturday night (and they are lucky to have a job) and has every intention to go to Mass on Sunday after they get off work. On the way to Mass, they have trouble keeping their eyes open, so they decide to go home and sleep rather than fall asleep behind the wheel, possibly injuring or killing someone.
Is missing Mass for this reason a sin? If so, what kind (mortal? venial?)?
May I ask if there is church Sunday afternoon? I personally don't believe you committed a mortal sin because you missed mass, however, as a catholic this issue probably needs to be addressed with a priest, especially if it's an ongoing thing.
That said, I believe it is your intent that is most important of all. Attending church is not just about being physically present in mass but the connection that you make with God while you're there. If you weren't able to attend mass because of your job you could still talk to God and worship and praise Him right there in the car on the way home from work. I'm not saying this should take the place of going to church, but you can always connect with God wherever you are. God is omnipresent (everywhere) but does manifest His presence in the places where He is worshipped (church and otherwise),
Attending mass and worshipping God is the stepping stone to worshipping and connecting with God on a daily basis. That is where your walk with God should take you.