Since Citraketu was a devotee of the Lord, he was not at all disturbed by the curse of mother Parvati. (One day while travelling, Citraketu wandered into the bowers of Sumeru Mountain, where he came upon Lord Shiva embracing Parvati, surrounded by an assembly of Siddhas, Caranas and great sages. Seeing Lord Shiva in that situation, Citraketu laughed very loudly, but Parvati became very angry at him and cursed him. Because of this curse, Citraketu later appeared as the demon Vrtrasura). He knew very well that one suffers or enjoys the results of one’s past deeds as ordained by daiva-netra– superior authority, or the agents of the Supreme personality of Godhead. He knew that he had not committed any offense at the lotus feet of Lord Shiva or the goddess Parvati, yet he had been punished, and this means that the punishment had been ordained. Thus the King did not mind it. A devotee is naturally so humble and meek that he accepts any condition of life as a blessing from the Lord. Tat te ‘nukampam susamiksamanah (Bhag. 10.14.8). A devotee always accepts punishment from anyone as the mercy of the Lord. If one lives in this conception of life, he sees whatever reverses occur to be due to his past misdeeds, and therefore he never accuses anyone. On the contrary, he becomes increasingly attached to the Supreme personality of Godhead because of his being purified by his suffering. Suffering, therefore, is also a process of purification.
Source: A.C. Bhaktivedanta Swami Prabhupada (2014 edition), “Srimad Bhagavatam”, Sixth Canto, Chapter 17 – Introduction & Text 17