That servant, however, who commanded (by his master) disregardeth the latter’s injunctions and who enjoined to do anything refuseth to submit, proud as he is of his own intelligence and given to arguing against his master, should be got rid of without the least delay.

In plain words: Vidura tells King Dhritarashtra that a servant who ignores orders and refuses to obey should be dismissed at once. This applies when he is too proud of his own cleverness and keeps arguing with his master.