By His Divine Grace A. C. Bhaktivedānta Swami Prabhupāda
Try to understand Krishna. How will you understand Krishna? Krishna is so great. You cannot understand Krishna by these blunt material senses. That is not possible. You have to purify them. Tat-paratvena nirmalam [Cc. Madhya 19.170]. Simply by Krishna consciousness, by always thinking of Krishna, all your senses will be purified. This is the process. Sevonmukhe hi jihvādau [Cc. Madhya 17.136]. And you can begin service with your tongue.
Now, this is also very surprising. By utilizing our tongue, we can become perfect. This is also unknown to the modern science. By utilizing the tongue, one can become perfect. Yes. This is the process. If, by the tongue, you chant Hare Krishna mantra, and by the tongue you taste prasādam, you will become perfect – simply by executing these two things. Do not accept anything, do not allow the tongue to touch anything which is not offered to Krishna. This is one item. And another item—engage the tongue always in chanting Hare Krishna. You become perfect. Is it a very difficult task? Anyone can do. Hare Krishna maha-mantra – anyone can chant. And nice prasādam – anyone can take. And actually, it is happening so. How are these European and American boys and girls advancing and realizing? Simply by that process – tongue – chant Hare Krishna and take prasādam.
So you can introduce this process all over the world. Give them chance to chant Hare Krishna mantra. But (at the same time) it is difficult (to chant) also. There was a cartoon: One old lady is requesting her husband, “Chant! Chant! Chant!” and the husband is replying, “Can’t! Can’t! Can’t!” There was a cartoon. So we are requesting everyone, “Please chant,” and they are replying, “Can’t.” Still, they will not chant. This is the difficulty. Otherwise, we can deliver all the people on this earth back to home, back to Godhead, simply by this process. Chant and take prasādam.
Just like the other day we held the Ratha-yātrā festival – chant and take prasādam. That’s all. Organize this all over the world. They will be saved. They will understand Krishna. Sevonmukhe hi jihvādau svayam… [Brs. 1.2.234]. Krishna will appear. You cannot see Krishna. That is not possible. You cannot order Krishna, “Please come, I want to see You.” No. But, when He is pleased with your service, He will come. “Yes, I am here. See Me.” That is the history. Just like Dhruva Maharaja. Dhruva Maharaja was meditating, and within six months, he saw Krishna, face to face. So everyone can see. Everyone will be able (to see Krishna), provided we utilize the tongue. Try to control the tongue and engage in it Krishna’s service.
[An excerpt from a lecture delivered on the Bhagavad Gita 1.10 in London on July 12, 1973]