Effects of Kaliyuga....

Verse 1.4.17-18: When Vyasadev sat in meditation, with his vision he forsaw what is going to happen in Kaliyuga. He could see that in terms of life span, memory, height, agricultural produce, everything is in reduced scale in this age.

When someone is involved in satisfying their lustful propensities, their name, fame, life span, desire for going back home to Godhead is all reduced. In this age, this is so much prevalent.

Disease starts from the mind. If we have unhealthy ideas and a strong desire to enjoy independent of Krishna, that will show its effect on the body eventually, manifesting in the form of disease.

Vyasadev could actually foresee all these degradations in Kaliyuga.
9th Canto SB says, if we are too lusty and give up shy, then what happens, then such habits (like alcoholics) become natural, due to the weakness of the heart (hrdaya-daurbalyam). This can happen with chanting also. We might not fight to keep the mind on the Holy name. We will just complete the rounds with our mind elsewhere. Hence it is very very important to chant sincerely.

But what is the hope of Kaliyuga: By chanting the Holy Name of Krishna, we can go back to the spiritual world. We have a jewel with us, but Maya will try to take it away from us,little by little. That's why when maya tells don't chant, we should chant. When maya tells don't associate with devotees, we should associate.