We can have a moral certainty, if we follow and obey Jesus, and if we die in the state of following and obeying Jesus (ie, not in a state of apostacy or mortal sin). We cannot have a prideful presumption,ie., “I can do whatever I want, I’m saved,” but I think we can have a humble confidence in Jesus and His Mercy, if we constantly seek after that Mercy and are constantly being created/re-created in His image. We cannot have an absolute certainty because, frankly, we cannot tell the future, or if we will continue to follow Him and confess Him. It seems to m that we have to walk a line between proud presumption and debilitating despair.