The Cubits obviously were irrational in lieu of the sum total. The Bible is more the work of the Crucifiers than of the Congregation and discerning the difference is the actual task in finding its Truths.
Can some one tell me how science tells us that a human body is worth something and should not be burned like coal to produce energy or any moral giudance that we should not do bad things etc.
That would be more of an issue of "social science" or ethics. I don't know which point you are trying to make by asking this question, but I assume that you mean something like: "Without religion, people will lose all sense of morality and start killing everyone causing society to collapse." This is actually false, because there are many countries where most people do not actually follow any religion (think the Scandinavian countries in Europe... despite being Christians "on paper", stats show a lot of people do not believe in the Christian religion) and nothing like that has happened. There are moral standards in any civilization, such as being polite, not stealing, not killing others, etc which are common everywhere and taught to children through education by the parents and the schools. Now those rules and standards are not written down in stone, in fact, while there are books on how to be polite, etc. there is no universal moral code that governs all behavior. As such, these standards evolve over time as society progresses. Remember, behaviors that would be considered scandalous 200 years ago are perfectly acceptable now (the way of dressing, showing affection in public, calling your boss by his first name, etc, etc.) Furthermore, religion does not give all the rules that we follow as a society. For example, I don't know of any religious book that says "Don't burp in someone's face, don't spam on a forum, don't talk loudly on your cell phone in a bus, etc". This is where the customs and standards of each individual society come in.
They instinctively know Christianity is a false religion not that religion is false. Atheist should someday stop hiding behind false religions as the reason to disbelieve there is a Religion of Origin. Obviously there are instinctive laws and when properly refined are capable of producing multiple answers including life's longevity.