A discourse of Swami Vivekananda on Mahabharata : 2.
There were two brothers, sons of the emperor. The elder one was called Dhritarâshtra, and the other was called Pându. Dhritarashtra, the elder one, was born blind. According to Indian law, no blind, halt, maimed, consumptive, or any other constitutionally diseased person, can inherit. He can only get a maintenance. So, Dhritarashtra could not ascend the throne, though he was the elder son, and Pandu became the emperor.
Dhritarashtra had a hundred sons, and Pandu had only five. After the death of Pandu at an early age, Dhritarashtra became king of the Kurus and brought up the sons of Pandu along with his own children. When they grew up they were placed under the tutorship of the great priest warrior, Drona, and were well trained in the various material arts and sciences befitting princes. The education of the princes being finished, Dhritarashtra put Yudhishthira, the eldest of the sons of Pandu, on the throne of his father. The sterling virtues of Yudhishthira and the valour and devotion of his other brothers aroused jealousies in the hearts of the sons of the blind king, and at the instigation of Duryodhana, the eldest of them, the five Pandava brothers were prevailed upon to visit Vâranâvata, on the plea of a religious festival that was being held there. There they were accommodated in a palace made under Duryodhana's instructions, of hemp, resin, and lac, and other inflammable materials, which were subsequently set fire to secretly. But the good Vidura, the step-brother of Dhritarashtra, having become cognisant of the evil intentions of Duryodhana and his party, had warned the Pandavas of the plot, and they managed to escape without any one's knowledge. When the Kurus saw the house was reduced to ashes, they heaved a sigh of relief and thought all obstacles were now removed out of their path. Then the children of Dhritarashtra got hold of the kingdom. The five Pandava brothers had fled to the forest with their mother, Kunti. They lived there by begging, and went about in disguise giving themselves out as Brâhmana students. Many were the hardships and adventures they encountered in the wild forests, but their fortitude of mind, and strength, and valour made them conquer all dangers. So things went on until they came to hear of the approaching marriage of the princess of a neighbouring country.