A similar question was asked a couple of days ago…

A similar question was asked a couple of days ago but I didn’t see any answers giving a solid argument, or one that could be used in a debate. So I’ll ask it again with follow up questions.

Can we lose our salvation? If NO, what is the PURPOSE of living righteous? Why not just live life, party, get drunk, sleep around and know you are not going into the lake of fire? Wouldn’t that be fun/better than feeling following rules when you will be saved anyway?

If YES, how would you explain to someone making a practice of lawlessness that it is wrong and most likely will not enter the kingdom of heaven?
Lastly, what is the different of salvation and being saved?