You have to use your own. I imagine that for example passages which urge people to hate their families if they want to be saved are tempered by your knowledge that loving your family is a desirable state. Passages which speak of creatures with bones of brass, the earth being a "circle" rather than a "globe", the foundations of the earth, stars falling to the earth from heaven, Jesus being shown by Satan all the kingdoms of the earth from a high mountain etc etc etc are obvious allegories even to you presumably. Now many Christians know that the physical evidence indicates that there was not a worldwide flood around 5kya, so they read the Noah story as an allegory, for example. You don't trust the experts who tell you of this lack of physical evidence for the flood, so you do believe in it (I think, from your previous posts)
Sorry - I believe the flood happened and it was world-wide and that eventually Noah's ark will be found. Until then, I have faith.