Why Sigils and Servitors??? Options

Ok I'm sorry if this question sounds dumb but from what I understand we use sigils to by pass the conciouss mind and send messages strait to the subconciouss so that are desires are manifested quicker, so why is it that we have to create a sigil to create a servitor??? I was also wondering if anyone could give me a simple explanation on what kind of sigil to create, I see that some people use pagan symbols and other people use the symbols of the elements and so on and so forth so any help would be greatly appreciated. I wish I could understand this better but my biggest intrerest is in psychology and how the mind works so it's hard for me to see this from any other view than a psycholigical/psionic. (IMG:style_emoticons/default/thankyou.gif)

To use a programming analogy, a sigl for a servitor serves as a symbolic link. It's something that allows you to "access" and/or "use" the servitor, even though they reside in different locations (physical and aetheric).