Mbh 3.206.4b

They, however, that are virtuous and engaged in the observance of vows, who are devoted to the srutis and the virtue of abstention from the pleasure of the world, they in fact who tread in virtue’s path and follow the true religion, they that are obedient to the mandates of their preceptors, and who reflect upon the sense of the scriptures with patience and carefulness,--is these that are said to be possessed of behaviour that is virtuous; it is these, O Brahmana, that are said to properly guide their higher intelligence. Forsaking those that are atheists, those that transgress virtue’s limits, those that are of wicked souls, those that live in sinfulness, betake thyself to knowledge reverencing those that are virtuous. Lust and temptation are even like sharks in the river of life; the waters are the five senses. Do thou cross over to the other side of this river in the boat of patience and resignation, avoiding the shoals of corporeal existence (repeated births in this world). The supreme virtue consisting in the exercise of the intelligent principle and abstraction, when gradually super-added to virtuous conduct, becomes beautiful like dye on white fabrics. Truthfulness and abstention from doing injury to any one, are virtues highly beneficial to all creatures. Of these, that latter is a cardinal virtue, and is based on truth. Our mental faculties have their proper play when their foundation is laid in truth, and in the exercise of virtue truth is of the highest value. Purity of conduct is the characteristic of all good men. Those that are distinguished for holy living are good and virtuous. All creatures follow the principles of conduct which are innate in their nature. The sinful being who has no control over self acquire lust, anger and other vices. It is the immemorial rule that virtuous actions are those that are founded on justice, and it is also ordained by holy men that all iniquitous conduct is sin.