by grace you have been saved), (Eph 2:5 NAS)
... perfect passive participle ... past tense, ongoing continuous results.
There are so many others ...
I just find it curious that those on your side fight so hard to maintain a formidable doubt concerning a persons salvation. If eternal life could be lost, as you seem to suggest, it wouldnt be eternal would it?
There are conditionals that your side likes to ignore. You can know you are in a state of grace if you are living like the Scripture tells you. It is true that those who will be saved will be, but it is presumption to assume that set of people must include you.
You know it’s you if you live it, not because you have “assurance” from an intellectual reading of the Bible that you can’t fail.