
Chapter divisions were added (and chapters numbered) in the Middle Ages in the 13th century. Later, in 1551, in the Middle Ages, verse divisions were added (and verses numbered).
It is best to always check surrounding verses and, when appropriate, verses in the previous or next chapter, to see if those verses have important meaning for the context.
The common
KJV (King James Version) Bible has
66 books,
40 in the
OT (Old Testament) and
26 in the
NT (New Testament). Isaiah has
66 chapters.
In the 13th century, the books were divided into chapters. With small variations, there are
1,189 chapters in the Bible,
929 in the
OT and
260 in the
NT.
In the 16th century, the chapters were divided into verses. There are about
31,000 verses in the Bible,
23,000 in the
OT and
8,000 in the
NT. Some verses are more important than other verses. Is that a controversial view?