That is an interesting question since in answer it would be to understand what the word secular means:
Sec·u·lar
/ˈsekyələr/
adjective
- 1.denoting attitudes, activities, or other things that have no religious or spiritual basis.
Secular is incompatible with the Bible since it is the word from God that defines or explains religion, which is indeed spiritually accurate, but it is people that is unable to express true religion. The Bible itself can have secular books inside of it that do not reflect religious values in anyway, some stories of the people in the Bible for example are known as worldly. In this case since people are unable to acknowledge the truth without God’s help, they are totally capable of being secular especially in forms of worship and defining it.
This is the way we can be sure that the Bible was places together and written by God because the genuineness of religion is always present. Even though people themselves may not be able to comprehend it since religion can be rejected by humans at any time. Some are born without any understanding of God and continue in that way always called atheist. Some people are inclined to “Fall Away” and become apostates, well you can only depend on God always. What is a picture that translates a secular Bible?
What is the biblical definition of apostasy?
Apostasy in Christianity is the rejection of Christianity by someone who formerly was a Christian or who wishes to administratively be removed from a formal registry of church members. The term apostasy comes from the Greek word apostasia ("ἀποστασία") meaning "defection", "departure", "revolt" or "rebellion".
What is an apostate person?
An apostate is someone who has totally abandoned or rejected their religion.