It is said, mahad-vicalanam nrnam grhinam dina-cetasam (Bhag. 10.8.4). The only business of a saintly person or sannyasi, a person in the renounced order, is to preach Krsna consciousness. Sadhus, saintly persons, want to preach to both the poor and the rich, but the poor take more advantage of the sadhus preaching than the rich do. A poor man receives sadhus very quickly, offers them obeisances, and tries to take advantage of their presence, whereas a rich man keeps a big greyhound dog at his door so that no one can enter his house. He posts a sign saying Beware of Dog and avoids the association of saintly persons, whereas a poor man keeps his door open for them and thus benefits by their association more than a rich man does. Because Narada Muni, in his previous life, was the poverty-stricken son of a maidservant, he got the association of saintly persons and later became the exalted Narada Muni. This was his actual experience. Therefore, he is now comparing the position of a poor man with that of a rich man.