Out of respect for the king, unless he faced the sea monsters of the Blight Sea, Wen Tianhua never used his Eye of Revelation without permission. Others might not know this, but Zi Xian and Zi Shou were both aware of the reason why Wen Tianhua suppressed himself. Yet, the father and son pair were now throwing him to the wolves, using his lack of power abuse as an excuse to demand his Eye of Revelation.
Had Zi Xian been alone in this robbery attempt, Wen Tianhua wouldn't have been surprised. But for Zi Shou, a boy that he'd practically raised, to treat him so cruelly, made the Grand Preceptor question where he'd failed in the seventh prince's education.
Yes. It had to be his fault. Maybe by putting the well-being of the king and nation before that of his disciple, as Zi Shou's only reliable father figure, he'd failed.