VIDURA'S OPPORTUNITY

Vidura took it as an opportunity to leave the palace of his brother Dhritarashtra and all the political wranglings that went on there...common to government life. Duryodhana insulted him and also threatened him accusing him of being an enemy spy because of his affection for the Pandavas. And actually Vidura was a kind of spy. He did warn the Pandavas about the house of shellac to be set afire.

Srila Prabhupada describes how Vidura was actually grateful to Duryodhana for giving him the opportunity to exit Hastinapura, travel alone and visit holy places as a mendicant pilgrim. No one recognized him. His hair had grown out and his clothing was that of a mendicant. 

He took the insults as a great blessing and gave up everything to fix his mind more purely on devotional service to the Lord. He met Uddhava who was lost in the mood of separation and later Maitreya Rsi who instructed Vidura in the science of transcendence.