There are four classes of men: lazy intelligent, busy intelligent, lazy fool and busy fool. First-class man is lazy intelligent. So first-class man is lazy intelligent. Just like you’ll see the high-court judges, they’re very lazy and most intelligent. That is first-class man. They are doing everything very soberly. And the next class: busy intelligent. Intelligence should be used very soberly. And the third class: lazy fool — lazy, at the same time, fool. And the fourth class: busy fool. Busy fool is very dangerous. So all these people, they’re busy. In this country — everywhere, all over the world, not this country or that country — they have discovered this horseless carriage — very busy. [imitates cars’ noise] “ons, ons,” this way this way, this way. But actually, they are not intelligent. Busy fool. Therefore they are creating problems after problem. That’s a fact. They are so busy, but because they are fool, therefore they are creating problems.

From Srila Prabhupada’s lecture on Srimad-Bhagavatam 1.16.23 — Hawaii, January 19, 1974