do you know how many times the number 40 appears in the bible? there's no way it would rain exactly 40 days and moses would be with god 40 days, jesus would fast 40 days etc. it's obvious that there is some meaning behind it.
but if you want to know the truth you can't just apply a random meaning to it. you have to know what the bible writers meant with the number.
btw... according to christians, we have lived on earth about 6000 years. and 1 day in heaven is like 1000 years, so one divine year is 360000 earth years. 360000x6000=2,160,000,000. that's pretty close to the real age which is supposed to be 2 billion years according to ancient science. maybe just a coincidence though...
i haven't tasted real coffee in this life yet.
So one has to know what the bible writers meant. How does one get to know this . The bible is full of 40s, so there is no point looking there .Which external source does one consult ?