We don't know that various biblical texts haven't been designed deceitfully or subverted
Christendom couldn't even agree on various principles such as the nature of Christ so they met a number of times at synods, for example at Nicea. Some argued that Jesus was made up of two natures: human and divine. Of those some believed that these natures were like water and wine: they mixed together to make a whole. Others argued they were like water and oil and seperate. Arians argued that he was just a man.
Anyway the point is that HUMANS got together and decided on the official line of how they were going to package christianity for the masses....so all these claims of certainty revolving around the bible and around the figure of Jesus are built on what evidence?
I don't know how much of this Dan Brown has covered but i know he has written stuff on the Knights Templars and on Rosslyn Chapel
My country (Scotland) is run by Freemasons. There are more lodges in Scotland than in the rest of the world. Lodge 0 is here (Kilwinning). One of the masonic rites is the 'Scottish Rite'.
There does also seem to be clear links with the Knights Templar. For example one of the prominant Norman families is the Sinclairs (or St Clairs). Here's a list of the grand masters of the grand lodge of Scotland.The first grand master, as you can see, is a Sinclair:
http://en.wikipedia.org/wiki/List_of_Grand_Masters_of_the_Grand_Lodge_of_Scotland
The sinclair chapel (Rosslyn) contains templar carvings and pagan imagery, such as the archetypal figure of renewal, the green man:
One version of history says that Hugues De Payens (one of the founding knights of the Templars) was married to Catherine St.Clair.
When the Templars were persecuted by the Catholic Church the only places in Christendom they could flee to was Scotland and Portugal.
Scotland was being ruled by Robert the Bruce who had been excommunicated by the Catholic Church for stabbing to death a rival for the crown (Comyn) in a church, on holy ground so Scotland was outwith the influence of the catholic church. The Templars helped the Bruce defeat the English at Bannockburn and were rewarded with lands around Scotland. One giveaway that Templars owned a place is the place names. Names you will find in Scotland a lot include the words: 'Rose', 'Temple', 'Mount'
The Templars had their headquarters on the Temple Mount on Jerusalem and their preceptory in Scotland was called 'Temple'
The rose has spiritual significance because the gnostic path (the Templars were influenced by gnosticism and Kabbalah) is the rose cross path (Rosicrucians/rose-croix/rose cross)
The rose (jesus) represents man or the microcosm pinned to the cross, representing the cosmos or the macrocosm.
These words are also found in the family names of elite Norman families such as the Roseberry's who were a prominant family in Scotland. One of them married a Rothschild daughter and then became the Prime Minister of Britain. These words are also in the street names in Edinburgh and towns, houses and villages like: Montrose (Mount-Rose), Mount Stuart, Rosewell....you see it everywhere once you are looking for it
The gnostics believe that we all have a divine spark within us and that it is possible for us to experience the divine in this life (the sufis also believed this and the Temlplars came into contact with their ideas whilst in the Holyland as well. The holyland was sitting at a crossroads on the trade routes between the east (as far as China and India) and the west (as possibly as far as America...see the 'Westford Knight'
http://en.wikipedia.org/wiki/Westford_knight and bit about America below). Spiritual ideas were flowing along these trade routes from China and India and all these ideas were flowing into the middle east.
There is an idea that those in the occult world knew about the Americas before Colombus went there. The red cross on the sails of his ships is the cross of the Templars. The Sinclairs (Earls of Orkney and of viking lineage) possibly voyaged to the Americas. The vikings it is now accepted (since remains of a viking settlement were found in the 1960's) went to the americas before Columbus did. There is of course the legend of Atlantis a land destroyed in a cataclysmic deluge, whose survivors possibly settled in egypt as it is written on the walls of a temple there. The Egyptians told Solon about Atlantis...at least that's Plato's version of the story. They would have been a sea faring people with links to the Americas and scientists have now found tabacco and cocaine in Egyptian mummies...plants only found in the Americas (here's a programme on it:
http://www.channel4.com/programmes/the-mystery-of-the-cocaine-mummies)
Thor Heyerdahl famously proved it was possible to cross the pacific ocean on a reed boat (the kon-tiki). By the time the Americas had been officially 'discovered' by Columbus the Rosicrucian Francis Bacon wrote a piece called 'the new Atlantis' outlining the plan to create a new world in the Americas....a blueprint for the secret societies, who then in time ousted the British thrown and took control of the US. Many of those that drew up the declaration of independance were freemasons.
he's pointing to the heavens and the ground....the macrocosm and the microcosm.
Washington monument, which is a solar phalic symbol...the water represents the female aspect:
That was a bit of a random detour but back to the gnostics. the idea that we all have a divine spark within us is highly heretical to the Catholic church which wants to externalise god. They do this so that they can place themselves between the people and god and call themselves the intercessionaries between us and god, which of course gives them power. Also they get everyone from every catholic community to tell them all their dirty secrets (confessing sins) so that they hold power over people. This trick is also used in initiations of secret societies such as the skull and bones society in Yale University.
Here is the Catholic churches own phallic symbol in the middle of the vatican in a solar wheel:
And the sun in the basilica ceiling:
Jesus represents solar consciousness and the sun that rises everyday and is a continuation of the sun god helios.
Once the Templars were in Scotland they took over the powerful stone mason guild and created Freemasonry. From there it expanded out into the world. After the 'union of the crowns' in 1707 which unified Scotland and England there was within a very short space of time grand lodges opening in the capital cities: London (1717), Edinburgh (1736) and Dublin (1725).
It appears that Freemasonry is in the lowest degrees a continuance of the mystery schools. These existed around the mediteranean: Isis mystery school in egypt, Mithras school in persia, Elusis in Greece. These schools had initiaition ceremonies where people were given something, told something and shown something. A christian, catholic priest tried to ridicule the ceremony by saying that what the heirophants (who lead the initiations) did was hold up a grain of wheat (do i mean wheat? Some crop anyway).....but this is slightly hipocritical when you think of what the catholic mass involves....which is holding up a piece of bread (made from wheat) and wine (made from grapes). Both these things are the fruit of the sun. You are not consuming Jesus, you are consuming the produce of the sun.
Here's a video of a talk for the Theosophical society by a freemason which talks about the origins of freemasonry. Obviously he is limited in what he can say and certainly doesn't mention that the upper degrees of freemasonry are about Qabalah and sex magic:
http://video.google.com/videoplay?docid=-1913913188318395102#
Anyway, i've rambled on a bit.....
I do however think it's a good idea to question everything...including what i have said....for all i know i might be wrong in some elements. I have no definitive answers just lots of pieces of a giant puzzle i'm trying to piece together
In summary there are many ideas about the divine residing within us. Christianity grew out of this melting pot of ideas in the middle east & roman empire like: Pythagoreanism, platonism, kabbalah, buddhism, hinduism, sufism etc)
Christianity is arrogant if it sees itself in isolation...it can't even make up it's own mind what it is, from early on it was divided and is to this day full of schisms! Many in the greek speaking world thought that Islam was just a heretical from of christianity when it came onto the scene...the two do not exist in isolation.