Sagittarius is the seeker. Jupiter, the largest planet, rules you — and you carry that energy of expansion. You came in to study, to travel, to hold beliefs and update them, to see how big this thing called life actually is.
The shadow of Sagittarius is preaching at the people you love and missing the small intimate truths because you're too busy chasing the big ones. The mature Sagittarius has learned that the cosmos is also fully present in a single conversation with a single human.
You'll recognize yourself in Sagittarius if you feel claustrophobic in routine, if "we should travel together" is something you say genuinely to people you barely know, and if you can't stay in a relationship where the worldview never grows.