Mahabharata 3.198.76

3.198.76

taṃ sadācāramāścaryaṃ purāṇaṃ śāśvataṃ dhruvam |
dharmaṃ dharmeṇa paśyantaḥ svargaṃ yānti manīṣiṇaḥ || 76 ||

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. Those who are not swayed by anger, pride, haughtiness and envy, and those who are quiet and straight-forward, are men of virtuous conduct. Those who are diligent in performing the rites enjoined in the three Vedas, who are wise, and of pure and virtuous conduct, who exercise self-restraint and are full of attention to their superior, are men of virtuous conduct. The actions and conduct of such men of great power, are very difficult of attainment. They are sanctified by the purification of their own actions, and consequently sin in them dies out of itself. This virtue of good conduct is wonderful, ancient, immutable and eternal; and wise men observing this virtue with holiness, attain to heaven.