Sect is a fundamental scheme of astrology that provides a foundational basis for how nearly all astrological doctrine operates, including determining which planets will act most favorably and be the most challenging in a given natal chart, how and where each planet functions most optimally and naturally in various schematics of dignity, and even how to approach certain timing techniques from a technical standpoint. The original greek term is hairesis, meaning choice or selection, meant to identify one’s intellectual ‘choice’ and was used for a school of thought in philosophy or medicine. Sect refers to the division of the seven traditional planets into two teams or factions—the diurnal sect, or day team, and the nocturnal sect, the night team.