PURPORT

Vasudeva wanted to save the life of Devaki by promising to deliver his sons to Kamsa. "In the future," he thought, "Kamsa may die, or I may not beget any sons. Even if a son is born and I deliver him to Kamsa, Kamsa may die at his hands, for by providence anything could happen. It is very difficult to understand how things are managed by providence." Thus Vasudeva decided that he would promise to deliver his sons to the hands of Kamsa in order to save Devaki from the imminent danger of death.