 His brother Willem stated that de Klerk's demeanour was marked by "soberness, humility and calm", that he was an honest, intelligent, and open minded individual, and that he had a "natural cordiality" and a "solid sense of courtesy and good manners".He felt that de Klerk's "charisma" came not from an "exceptionally strong individualism" but from "his rationality, logic and balance".He was, according to de Klerk, "a man of compromise rather than a political innovator or entrepreneur".