Sagittarius is ruled by Jupiter, the most benefic planet in Vedic Astrology. Saturn is an airy planet and Jupiter is ether, meaning space or quintessence, way above the terrestrial sphere that consists of other elements like earth, water, air, and fire. The relationship between Saturn and Jupiter is neutral. Jupiter vacuums the impurity so Saturn here works in harmony. It accepts and lets the signification of Jupiter overpower. This placement of Saturn in Sagittarius makes the person spiritual.
People with Saturn in Sagittarius have a serious approach to religion, philosophy and education. These natives believe in hard work and are quite sincere and disciplined. Their focus in life is on earnings and success. They are quite smart & skillful, and know how to artfully get things done from others. They have a strong inclination towards teaching and spiritual books. They also earn a lot of popularity in their life. Generally, these natives lead a happy life, are faithful and also have dutiful children. They seek a peaceful atmosphere for all to flourish. They have a lot of interest in virtuous activities.