Complex sentence: Richard discovers that this close friend of his has kept many secrets from him for his entire life, Zedd, is not the simple man that Richard had presumed him to be, but rather the wizard for whom Kahlan is looking.
Split into simpler sentences: Richard discovers that this close friend of his has kept many secrets from him for his entire life. Zedd is not the simple man that Richard had presumed him to be, but rather the wizard for whom Kahlan is looking.