Prabhupāda: To understand Kṛṣṇa is difficult job, because Kṛṣṇa says, manuṣyāṇāṁ sahasreṣu: "In thousands and thousands of people, one may be interested for siddhi." What is that siddhi? Siddhi, perfection. The perfection is how to get out of these material clutches, how to stop this repetition of birth, death, old age and... That is called siddhi. So kaścid yatati siddhaye.
Who is interested? They are dying like cats and dogs. They have accepted, "Oh, death is..." That's all. But there is a solution of death, but they are not interested. They are prepared to die like cats and dogs. That's all. The human life is meant for making solution of birth, death, old age and disease, but they will not take it. "Oh, that's all right. Let us die." "You are going to accept a next life as a tree." "Never mind." They say like that. "I'll forget." "No, you'll have to stand up seven thousand years in one place." "That's all right." They have become so dull. This is called Kali-yuga. Mandāḥ sumanda-matayo manda-bhāgyā hy upadrutāḥ (SB 1.1.10). Very slow, very bad. Manda means very bad. Sumanda-matayo, and if one has got some path or some sect, that is also adulterated, nuisance. Manda-matayoḥ. Manda-bhāgyaḥ, unfortunate. Even people have no idea what he's going to eat tomorrow. Actually, these things are coming. Manda-bhāgya, most unfortunate. And upadrutāḥ, always disturbed by so many natural disturbances, health disturbances, political disturbances. This is the position.
So there is great necessity of pushing on this movement, Kṛṣṇa consciousness, so that their life may be perfect. Although it is a difficult job, but still, we are trying our best. If people take advantage of this movement, then the whole problems of his life will be solved. That is Kṛṣṇa consciousness movement.
(Srila Prabhupada Lecture, Bombay, September 28, 1973)