The English physicist Isaac Newton had a bit of thing about the number seven; so convinced was he that it was the number God had chosen to order the universe, that he looked for it everywhere. He was convinced that the Sun had seven planets, that the rainbow was made up of seven colours and that the number seven was at the heart of all creation.
Unfortunately, any five year old will ask the question ‘Isn’t indigo just dark blue?’, and put a hole through his argument. Of course it is the same colour – yet Isaac Newton had to include it, otherwise the rainbow would have had just six colours and not fitted into his theory at all!
As a young man, Newton came up with many key theories that are still true; his theory of gravity, his theories of motion, his theory of light, and he (arguably) discovered calculus, yet as an older man he devoted himself to trying to crack the code behind all the numbers mentioned in the Bible. What the result of this ‘code cracking’ might have been, we will never know, as he died with his work incomplete and his Biblical theories unresolved.
It is easy to adopt a ‘pick and mix’ attitude to many aspects of the Old Testament...