Tarot Emperor is depicted as lord of both worlds, seen and unseen symbolized by the plants of Upper and Lower Egypt, the lotus and the papyrus.
Lord of both worlds, Upper and Lower Egypt, symbolized by the plants of these two regions, the lotus and the papyrus. Metaphysically these two worlds are the seen and unseen, the conscious and the subconscious.
For a deeper understanding of the cards take time to consider what is occurring in the natural world when the Sun enters Aries. Translate this astrological phenomena as a metaphor to discern its meaning regarding your question.
Interpretation must come from within oneself through listening to one’s own inner voice. Take time to read Julian Jaynes thought provoking book The Origin of Consciousness in the Breakdown of the Bicameral Mind to understand the impact of what lies behind this simple statement.
Emperor represents the archetypal voice behind the 2, 3 and 4 of Fire. When unable to interpret the appearance of these three cards when they appear in reading let your mind fall back upon the Emperor and listen for a resolution of the conundrum.
Tarot of the Morning Star revised and expanded second edition available from Magus Books