Any “uncertainty” is on man’s own selfish desire, and the demand to fulfill his lusts. When you “know in whom you have believed,” and have more than mere religion, having put on the mind of Christ, then you will understand. The only way to “put on the mind of Christ,” is to bathe your mind in the word of Go that it might be transformed to God’s way of thinking.
To make a statement that I am “religious” and that I haven’t “put on the mind of Christ” is presumptuous at best.
Your answer indicates to me that you didn’t go study this out. That’s okay, but it does seem you are a serious student of the Word. If so, you are doing yourself a disservice to speak so confidently on an issue you haven’t taken the time to understand.
When I used the word “uncertainty”, it certainly wasn’t to indicate I was uncertain, it was to encourage you to go look at the original language and see for yourself. I have no doubt. I have put the time and effort in to thoroughly understand what the word of God says on this issue.
There is a definite difference in “mia” and “heis”, and it is not without reason that mia was used.
Furthermore, look at 1 Corninthians 7:2, it is highly unlikely that Paul would have chosen to use different words for “own” within the same sentence without reason.