part of the symbolism may suggest trancension - as if breaking the bonds of gravity....ascending toward the heavens. also the vision or focus suggested can seem better than average, which may relate to the eye of ra symbol.
scorpions of scorpio (as a water sign) can seep into cracks like water and so reach or dig into regions inaccessible to most others. it may be that scorpion venom can offer some transcendental effect...and likewise they may command respect by simple appearance. a scarab beetle and a scorpion may share similar shell colors...
i think of ra as offering a mercurial quality, related to the wordforms. mercury was symbolized with winged shoes which suggests transcension. i also think of ra as having a leo quality, leo ruled by the sun. there's likely connection to every sign to be found in ra, testament to a sense of wholeness integration.