Whenever there is lenient government, the rogues and thieves will increase. It is natural. And if the government is very strict, then rogues and thieves cannot become very prominent. So when Kṛṣṇa comes, He has got two business: paritrāṇāya sādhūnāṁ vināśāya ca duṣkṛtām (BG 4.8)—for giving protection to the devotees, to the faithful, and for killing the demons.
So Kṛṣṇa, when He was present, He exhibited these two things. Perhaps you have seen our picture of Nārāyaṇa or Viṣṇu. Viṣṇu has got four hands. In two hands He has got lotus flower and conchshell, and in the other two hands He has got a club and a disc. The disc and club is meant for vināśāya ca duṣkṛtām, for killing the demons and the miscreants. And the conchshell and the lotus flower is meant for giving benediction and blessings to the devotees.
So in the Bhagavad-gītā we understand about Kṛṣṇa. Bhagavad-gītā is a well-read book all over the world. In any country you will find edition of Bhagavad-gītā by the language of the country. So in this Bhagavad-gītā we find that Kṛṣṇa is giving instruction about what is dharma, religion. He says . . . and at the end of His instruction He says, sarva-dharmān parityajya mām ekaṁ śaraṇaṁ vraja (BG 18.66) that, "You give up other types of so-called religious principles. You simply surrender unto Me."
So in another place in the Śrīmad-Bhāgavatam it is said, dharmaṁ tu sākṣād bhagavat-praṇītam (SB 6.3.19): "Religion means the codes of God." Just like the state gives us some rules and regulation to live, and one who follows the rules and regulation or the laws of the state, he is called good citizen, and those who do not follow, they are called outlaws or rogues or so many things. Similarly, religion is very simple thing. It is not cumbrous. Simple thing.