Our only purpose is to present this Bhagavad-gītā As It Is in order to guide the conditioned student to the same purpose for which Kṛṣṇa descends to this planet once in a day of Brahmā, or every 8,600,000,000 years. This purpose is stated in Bhagavad-gītā, and we have to accept it as it is; otherwise there is no point in trying to understand the Bhagavad-gītā and its speaker, Lord Kṛṣṇa. Lord Kṛṣṇa first spoke Bhagavad-gītā to the sun-god some hundreds of millions of years ago. We have to accept this fact and thus understand the historical significance of Bhagavad-gītā, without misinterpretation, on the authority of Kṛṣṇa. To interpret Bhagavad-gītā without any reference to the will of Kṛṣṇa is the greatest offense. In order to save oneself from this offense, one has to understand the Lord as the Supreme Personality of Godhead, as He was directly understood by Arjuna, Lord Kṛṣṇa's first disciple. Such understanding of Bhagavad-gītā is really profitable and authorized for the welfare of human society in fulfilling the mission of life.
The Kṛṣṇa consciousness movement is essential in human society, for it offers the highest perfection of life. How this is so is explained fully in the Bhagavad-gītā. Unfortunately, mundane wranglers have taken advantage of Bhagavad-gītā to push forward their demonic propensities and mislead people regarding right understanding of the simple principles of life. Everyone should know how God, or Kṛṣṇa, is great, and everyone should know the factual position of the living entities. Everyone should know that a living entity is eternally a servant and that unless one serves Kṛṣṇa one has to serve illusion in different varieties of the three modes of material nature and thus wander perpetually within the cycle of birth and death; even the so-called liberated Māyāvādī speculator has to undergo this process. This knowledge constitutes a great science, and each and every living being has to hear it for his own interest.