I think I know what you are saying, but I am not positive.
When you say........."but everything in the bible is spiritual", what exactly are you inferring?
Personally, I take the view that everything in the Bible is literal, unless specifically stated other wise.
God created a LITERAL heaven and earth.
God created a Literal human being.
The cross of Jesus was a LITERAL event.
The 2nd Coming of Jesus is a LITERAL even.
Jesus took bread and said, "Take and eat; this is my body" in Matthew 26:26. Now IMHO that would be spiritual.
When Jesus told people that they must eat his flesh (verse 53), he did not mean it literally. That would be a figurative/spiritual sense of understanding. Even when he said that his flesh was "real food" (verse 55), he did not mean it literally. He explained that flesh is not important (verse 63). To be given eternal life, we need something spiritual.
This may seem trivial to some but I have seen how the difference can and does cause a variety of problems in understating what God wants us to learn and know. When I read the Scriptures, I understand words in a literal sense first, then in a figurative sense if the literal doesn't make sense. That's the normal way we use language, and it's a sensible way to start. Literal first, figurative/spiritual second.
Jesus speaking says, "It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you,
they are spirit, and
they are life (John 6:63).
The words are what? Spirit.
"God is spirit, and his worshipers must worship in the Spirit and in truth (John 4:24).
God is what? Spirit.
"For the word of God is alive and active. Sharper than any double-edged sword, it penetrates even to dividing soul and spirit, joints and marrow; it judges the thoughts and attitudes of the heart" (Hebrews 4:12).
The word of God is what? Alive.
Do you believe the bible was written by man's mind or by the Holy Spirit through men?
I believe it was written by God having the Holy Spirit work through men.
"All Scripture is God-breathed" (2Timothy 3:16).
"For the prophecy came not in old time by the will of man: but holy men of God spake
as they were moved by the Holy Ghost" (2 Peter 1:21).
God had a purpose in every word, in every word placement, in every verse.
The bible could have said, "God created in six days the heavens, the earth, everything in them including man and woman." He could have said the whole thing in one sentence, but he didn't. God's words are spiritual. A believer should have the Holy Spirit speaking to them as they read. That is why the same verse can be an ever deepening well with God adding a deepening spiritual understanding and also more comparative verses as the believer reads.
If the believer reads it without the Holy Spirit and without seeing God's spiritual meaning in every line, then he is no different in reading it than someone who says that they believe in God, but they don't believe in Jesus.
God's words are spiritual and have spiritual significance. Not some, but all of them.
"In the beginning was the Word, and the Word was with God, and the Word was God" (John 1:1).
Did God put this verse here for no reason. No. God is truth, not just speaks truth, is truth. God is life, not just speaks life, he is life.
"The Word became flesh and made his dwelling among us" (The Word is God as Spirit manifest that became flesh manifest).
The word of God is the truth of God's Spirit manifest in writing. God is the manifest Word that became flesh, life for us. His words are life for us.
I do not read the bible a certain way. I have the Holy Spirit guide me as I read. Do you not hear the voice of the Holy Spirit? How can you ask this. Every believer should hear the the voice of the Spirit of God (the spiritual) in every page and life of the bible.
"But the Advocate, the Holy Spirit, whom the Father will send in my name, will teach you all things and will remind you of everything I have said to you" (John 14:26).
"But the anointing which ye have received of him abideth in you, and ye need not that any man teach you: but as the same anointing teacheth you of all things, and is truth, and is no lie, and even as it hath taught you, ye shall abide in him" (1 John 2:27).
"But this is the covenant which I will make with the house of Israel after those days," declares the LORD, "I will put My law within them and on their heart I will write it; and I will be their God, and they shall be My people.
34"They will not teach again, each man his neighbor and each man his brother, saying, 'Know the LORD,' for they will all know Me, from the least of them to the greatest of them," declares the LORD" (Jeremiah 31:33-34).
"But when he, the Spirit of truth, comes, he will guide you into all the truth. He will not speak on his own; he will speak only what he hears, and he will tell you what is yet to come" (John 16:13).
"But the Helper, the Holy Spirit, whom the Father will send in My name, He will teach you all things, and bring to your remembrance all things that I said to you" (John 14:26).
The bible is just a book if not read spiritually.