This is not my interpretation of the bible ,but the bibles interpretation of it's self. To understand Gods word a person can't let themselves be guided by false religious traditions or ideas .If your church teaches you that there is an immortal soul, you will bring such a philosophy into the bible when you read it,this would then taint your understanding of it.
If a person really want's to know the 'Truth ..that will set them free', they have to do away with all their previous misconception and allow the bible to speak for itself.
The only people truly qualified to teach the bible ,are those who live by it !Obviously , the mainline religions of this world are not in a position to do so as they regularly disregard and water down it's teachings.Many of them say as you say ,that we shouldn't take the bible literally, and this is where they fall flat !
'What does Gods word say?' not 'What do I,or my priest/pastor think ?' is the important question.
Some may say taking such verses as Genesis chapter 1 where it talks about the creation in 7 days.But if you look at Chp 2:4, you see that all the days are referred to as 1 day. Obviously the bible isn't referring to 24 hrs in this case ,but simply to a period of time
which could be any length.It is not unusual for a person to refer to his 'grandfathers day' meaning that persons entire lifetime.So ,too, the bible often uses the term 'day'to describe an extended period of time.(2 Peter 3:8)Thus the days of Genesis chapter 1 could reasonably be thousands of years in length.
This is what is meant by letting the bible interpret itself !