Symbology.....is a very demanding subject, the meanings dependant on race, religion, time period. Many symbols often have several meanings.....some diametrically opposed !!!!
For Instance if you saw this symbol.....what would you think ?....what would you feel ? Once you have 'organised your thoughts' click on the link....
http://www.hostultra.com/~Exidor/Swastika/Swastika.html