Śrīmad-Bhāgavatam 2.9.4-8
—
Tokyo, April 23, 1972
Prabhupāda: ...memory was so sharp, that once heard, it is practiced immediately. In the Kali-yuga this memory is declining, and they are proud, "We are advanced." There is no question of advancement. It is simply degraded. But this is māyā. Falsely they are thinking, "We are advanced." In this age, memory will be reduced, duration of life will be reduced, people's merciful tendency will be reduced, strength of the body will be reduced. In this way everything will be reduced. Now we do not find very strong men, very strong memory, living for a long time, bodily strength. No. These are reducing. Now people are not merciful. One man is being killed before you in the street; nobody takes care. This is the sign of Kali-yuga.
Everything will be reduced. Memory also being reduced. There are eight kinds of things reducing. One of them, these four, five, I have already mentioned. Important things. The duration of life is reducing, no sympathy, no sympathy. One is suffering from some disease; nobody is taking care. This is the sign of Kali-yuga. "Oh, let him die. Let me live." These are the signs of Kali-yuga: no memory, no sympathy, no long duration of life, no bodily strength, no education. This is the symptoms of Kali-yuga. Therefore the only means is harer nāma harer nāma harer nāma [Cc. Ādi 17.21]. They cannot in the ordinary way it is impossible to make advancement.
Śrīmad-Bhāgavatam 2.9.4-8