One of the best ways to realize that our language and culture dictate how we think is to simply travel to another country and live with the locals (guided tours don't count ;-).

If all our experience based standards for truth are limited then the ONLY source of truth must be faith.  But for me that gets tricky because most religions are based on a culture.  So first, I must make a large distinction between faith and religion.  Most religions are merely collections of the teachings of other humans (Biblically they are called the "teachings of men"  and were denounced by the Christ) But I do believe that we can find the truth in faith, apart from the teachings of men.  So for me the discussion now turns to HOW do we determine if an article of faith is a truth outside of our various religious cultures?  I believe the process begins with a return to the original writings.  Once any of these texts has been "explained" by someone the original significance is obscured. I know this has been the case with the Bible and the original teachings of Buddha.  I can't speak for the Quran but there might be issues with various  hadith which often accompany the Quran. 

So how do we approach these sources of faith free of cultural bias?  Are there other steps in the process in addition to returning to the original writings?