MERCURY
Mercury according to mythology is the winged messenger of the Gods. Some mystics have even referred to Mercury as the older brother of the Sun. The myth is rooted in information transference. Primitively, Mercury is closest to the Sun and thus has its ear. In Human Design 'mythology' Mercury has a unique role in programming the Personality Crystal from the time it enters into the body until birth. In this context, Mercury is God of the mental plane and as such the 'creator' of Maia.
However, on the mundane level, Mercury activations in the Rave chart always point to essential concepts needing expression. What you need to communicate creates its own pressure. We are after all communicative creatures. So the specialized Mercury themes are important for us to express.
Keynote: Communication and Thinking
Mercury is associated with Mind and mental functions. Mercury activations in the chart point to essential concepts that need to be expressed.
On the Personality side, the theme of the gate it activates shows what we need to communicate and how we will express it. On the Design Side, it denotes a theme that is largely unconscious but equally important, and therefore builds pressure until it finds a way to express itself.