The recent, within, say, one thousand five hundred years, there are . . . there were many ācāryas like Rāmānujācārya, Madhvācārya, Viṣṇu Svāmī, and within five hundred years Lord Caitanya Mahāprabhu. They have also given us many literatures about this spiritual knowledge. But at the present moment this spiritual knowledge is neglected. So it is the Caitanya Mahāprabhu's message to the whole world that every one of you, you become guru, a spiritual master. So how everyone can become a spiritual master? To become a spiritual master is not easy job. One must be very learned scholar and must have full realization of the self and everything. But Caitanya Mahāprabhu has given us a little formula, that if you strictly follow the teachings of Bhagavad-gītā, and if you preach the purpose of Bhagavad-gītā, then you become guru. The exact words used in Bengali, it is said, yāre dekha, tāre kaha 'kṛṣṇa'-upadeśa (CC Madhya 7.128). To become guru is very difficult job, but if you simply carry the message of Bhagavad-gītā and try to convince anyone you meet, then you become a guru.
So our this Kṛṣṇa consciousness movement is meant for this purpose. We are presenting Bhagavad-gītā as it is, without any man interpretation. If we interpret Bhagavad-gītā in our own way, that is not very good. If you have got a different opinion, you can preach your philosophy. Everyone is free. But one should not take Bhagavad-gītā and through Bhagavad-gītā one will try to preach his own philosophy. That is very bad. You should not do that.