This was my favourite stencil. Unfortunately, the original got lost in a move and I haven't had the heart to do another. It's inspired by Shirow Masamune's original Ghost in the Shell comic. In this scene, the hero glimpses the birth of a new, intelligent life form. The thing in the middle is some kind of neural network, and descending onto it is an angel (the shape pointing down is the shade on a foot, some people don't notice it at first, but after it's pointed out, you can't help seeing it).
The idea is similar to the Sistine Chapel ceiling fresco, where God and Adam reach out towards each other. Michaelangelo captures the question of man's relationship with God. Masamune questions the relationship between man's body and man's spirit.
The medium here also hints at a direction for answers: Stencils are made up of use small, abstract, isolated shapes. However, in a particular configuration, they create an impression of a unified image to human perceivers. However, not all shapes are allowable - you can't have a stencil with free standing opaque parts (e.g. the outline of a full circle). In fact, even convex shapes decrease the integrity of the stencil. So, even as the whole influences how one interprets the parts, the parts influence what that whole can be.