Complex sentence: Corliss was both elated by the total power he held over the Korean and disgusted by a display of terror he considered weak and unmanly, and made up his mind right then and there to never show anyone any sign of vulnerability.
Split into simpler sentences: Corliss was both elated by the total power he held over the Korean and disgusted by a display of terror he considered weak and unmanly. He made up his mind right then and there to never show anyone any sign of vulnerability.