…Of course, the world is full of dangers. But Kuntīdevī says, “Because Devakī is Your devotee, You saved her from the distresses imposed upon her by her envious brother.”
…For sense gratification we have fallen into this material condition and are suffering in different varieties of life. Because this is the material world, even Kṛṣṇa’s mother was put into suffering. Devakī was so advanced that she became the mother of Kṛṣṇa, but still she was put into difficulties by her own brother, Kaṁsa. That is the nature of this material world. The living entities in this world are so jealous that if one’s personal interest is hampered, one will immediately be ready to give trouble to others, even to one’s nearest relatives.
“A person who acts in the service of Kṛṣṇa with his body, mind, intelligence, and words is a liberated person, even within the material world.”
Teachings of Queen Kunti
By His Divine Grace A.C. Bhaktivedanta Swami Prabhupada
Chapter 6
The Master of the Senses
yathā hṛṣīkeśa khalena devakī
kaṁsena ruddhāticiraṁ śucārpitā
vimocitāhaṁ ca sahātmajā vibho
tvayaiva nāthena muhur vipad-gaṇāt
O Hṛṣīkeśa, master of the senses and Lord of lords, You have released Your mother, Devakī, who was long imprisoned and distressed by the envious King Kaṁsa, and me and my children from a series of constant dangers.
—Śrīmad-Bhāgavatam 1.8.23
Devakī, the mother of Kṛṣṇa and sister of King Kaṁsa, was put into prison along with her husband, Vasudeva, because the envious King was afraid of being killed by Devakī’s eighth son (Kṛṣṇa). The King killed all the sons of Devakī who were born before Kṛṣṇa, but Kṛṣṇa escaped the danger of child-slaughter because He was transferred to the house of Nanda Mahārāja, Lord Kṛṣṇa’s foster father. Kuntīdevī, along with her children, was also saved from a series of dangers. But Kuntīdevī was shown far more favor because Lord Kṛṣṇa did not save the other children of Devakī, whereas He saved the children of Kuntīdevī. This was done because Devakī’s husband, Vasudeva, was living, whereas Kuntīdevī was a widow and there was none to help her except Kṛṣṇa. The conclusion is that Kṛṣṇa bestows more favor upon a devotee who is in greater dangers. Sometimes He puts His pure devotees in such dangers because in that condition of helplessness the devotee becomes more attached to the Lord. The more the attachment is there for the Lord, the more success is there for the devotee.
The Hare Krishna Movement 