Hello Caz, welcome to SOM, nice to meet you! :) You don't actually have to cast circle no but we cast a circle to keep ourselves safe. If you want to protect yourself when doing any work within your scared space the it's best to cast a circle & not leave yourself open & venerable.
Re: Hi I'm new
By: Askbogi / Beginner Mar 14, 2013
Post # 6
Personally,I disagree with circles,hence,never used one.
There are paths who work with circles all the time such as Wiccan and some paths do not need circles but they can be used if you feel unprotected enough.
The circle is a microcosm of that which you seek to influence. This is why we say 'as above, so below'. I think it depends on the type of working you are performing. If you are seeking to raise a cone of energy and then release it - a circle is very good for that.