About God's arguments changed over the years: there is definitely a shift between the old testament and the new BUT it was mentioned and if one is careful enough will draw conclusions that they are all part of the grand scheme of things right from the beginning in the book of Genesis in fact. From the sacrifices of animals, then the book of Isiah when it talks about the perfect sacrifice that is to come (not animals), etc. So, it is not that God suddenly changes His mind. Even if so, nobody can blame God. After all He is the boss ! It does not matter whether it makes sense to anyone or not. In fact if you look at nature, such as the duality properties of light is seemingly contradiction. Or why God created certain things that seemingly unneeded. It does not make sense to most people. But the fact is all are obviously created by an intelligent being.


The million dollar question is how does one know the voice inside is the REAL God ?


But I think I know the answer.... you guessed it..... miracles, prophecies are the real signatures of God ! God of the bible uses these things a lot to show that it is God that is speaking. Philosphies, words, etc are not powerful enough....God wants to show His power to authenticate His message.