You are correct that objectivity in the human is a myth.
Whoever you are, you are either on one side or the other, which means you either truly belong to Jesus Christ, or you don't, even if you don't know that those are your only two real choices.
That is the ultimate reality, and that is the only true reality, for your positional being -- either in or out of Jesus Christ -- is the sole determination of where you will spend eternity, and the eternity you will dwell in will not only be forever, but it will be more real than the world you live in now.
Jesus himself stated it so bluntly that it can't be denied --
"He that is not with me is against me; and he that gathereth not with me scattereth abroad... Labour not for the meat which perisheth, but for that meat which endureth unto everlasting life, which the Son of man shall give unto you: for him hath God the Father sealed." Matthew 12:30, John 6:27