Your rising sign reveals how you interact with the world, from your appearance, to your attitude, to the first impressions you make on others, the twins note. For example, they add, a Capricorn sun with a Leo rising will likely exhibit Leo-like traits you wouldn’t expect from typical Capricorn energy, or even look more like a Leo.
Your rising sign also determines where your first house of identity falls in your chart (your ascendant is always your first house), which sets the stage for the rest of the houses in your chart.
As the twins explain, “The zodiac wheel begins with the first house, which represents where the sun was rising over the eastern horizon at your moment of birth, and governs the self, the identity, and your first impression. The houses then move counterclockwise around the zodiacal wheel and ripple out to broader themes of family/home life, society, and beyond.”
Without knowing your rising sign, then, the rest of your birth chart will ultimately remain a mystery, because houses in astrology are just as important as the planets and signs when it comes to fully understanding chart placements and aspects.