I am going to create a virtual bible. In this bible I shall put: I'm not sure how big this bible is, but as you can see, its a fairly good representation of how physical things interact with one another. We have two distinct sections here Classical Physics, and Modern Physics. Old and New. Are there contradictions? You bet there are! The most obvious ones are: these:

The book of Newton Chapter 7 verse 1:
"Space and time intervals are absolute and the speed of light is relative"

The book of Einstein Chapter 2 Verse 1:
"The speed of light is absolute, and space and time intervals are relative"

The book of Einstein Chapter 16 Verse 18:
"God does not play dice with the Universe"

The book of Hawking Chapter 2 Verse 1:
"Not only does God play dice, but he sometimes throws them where they cannot be seen"

See! Contradictions in the Bible of Physics! Ha! The bible of physics is wrong! Therefore physics is wrong!. How can fools believe in science, when it can't even get its own story straight??

I think you see the point I'm trying to make. Of course the bible has contrary opinions, ideas and events. Not only is it a series of books documenting historical events, but it is also over 40 different people's opinion on the nature of God and His representatives. If the bible had no contradictions in it, I would severely doubt its quality as a source since it would have been obviously compiled by somebody who wanted you to agree with it.

Now one more point, the story of Snow White has changed considerably from its original as it was written hundreds of years ago, and has morphed in each telling. Aesop's Fables change all the time, the teachings of Buddha change depending on what the point of the story is - writings of Basho are translated in a thousand different ways. But in each case, the message is the same, even if previous teachings contradict the current one watch out for those trees, they'll stop you from seeing the wood.