Foolish persons accept the difficult path of karma-kanda for the sake of sense enjoyment, and those who are too much attached to sense enjoyment are called mudhas (rascals). It is very difficult for a mudha to understand the ultimate goal of life. In the propagation of the Krsna consciousness movement, we actually see that many people are not attracted because they are mudhas engaged in fruitive activity. It is said: upadeso hi murkhanam prakopaya na santaye. If good instructions are given to a foolish rascal, he simply becomes angry and turns against the instructions instead of taking advantage of them.
Srila Prabhupada, SB 4.25.9, ppt.