I remember my teacher mentioned this in class : 

> 
> "Do not believe in anything simply because you have heard it. Do not
>  believe in anything simply because it is spoken and rumoured by many.
>  Do not believe in anything simply because it is found written in your
>  religious books. Do not believe in anything merely on the authority of
>  your teachers and elders. Do not believe in traditions because they
>  have been handed down for many generations. But after observation and
>  analysis, when you find that anything agrees with reason and is
>  conducive to the good and benefit of one and all, then accept it and
>  live up to it."
> 
> 
> 

Does that mean that the sutras are 100% correct if I follow them? because it is very confusing, or according to what siddartha mentioned, I can't even trust the sutras when he says do not believe?