I think a reasonable analogy would be of someone trying to find a place by hit or miss while another uses Mapquest or a GPS. One might get there or one might get lost without a guide.
Ok. Let's go with that analogy.
But, first, the Bible is 2,000 year old. It's more like an outdated Thompson map guide with roads that don't exist anymore, roads missing, and it's for Palestine, but I want to go to New York!
I believe the Bible is God inspired so it serves as a better guide than any human philosopher could devise. Also maps are based on observation (to keep the analogy going) and the Bible is based on observations of God working.
I tried it for 30 years, and the reason why I left Christianity was that it didn't guide me or my family to go through the problems we had. We felt lost. And we tried for many years.
If you have to go to city and use an outdated map and you try it for years and years and you never get to the city but end up in the desert or in the ocean... what would you do? Get a new map!
I agree this is best but I believe the Bible guides one into the personal relationship.
It is best for you. That's the key. It works for you. It didn't work for me at the end. It did for many years, but then things happened and it didn't work anymore. Hence, we had to follow our hearts.
So in the end, it really comes down to you and how you work it. The Bible probably works for you because you can interpret it on a subjective level to fit your life. But if you get into a situation where the Bible can't map it for you, you're still on your own.