For me, as a believer, I believe that the whole of Scripture, not just a few verses, not just the “New Testament,” not just the “Old Testament,” not just the parts I like, are to be followed as I can understand them, in strong correlation with the rest of the Scriptures. If a Scripture is impossible to live out in this time, in my country, then I accept that. If I cannot understand a Scripture, I study it, research it, read it (the best I can) in Hebrew/Greek, ask questions of authorities, then comply.
A little example: as a teen, I asked why the church organization I attended then had their main worship-gathering day on Sunday, and not one leader/individual could answer. I kept studying, reading, and asking until, when I was 42, someone gave me a straight answer that matched with Scripture.
For living, for life, it is all the Scripture or none of it. There is no way I will live by any antiquated book without an awfully good reason, no way I will follow a god without 100% belief. It would not be worth the trouble. I would merely eat, drink, and be merry.