Because people are suffering for want of this knowledge, therefore our Krsna consciousness movement is the only movement — I can declare very proudly — which can actually do some benefit to the human society. It is the only movement. All other, bogus movements, I declare. Let them come and study the sastras and decide for themselves. They're all cheating.
From Srila Prabhupada's lecture on Srimad-Bhagavatam 1.5.30 — Vrndavana, August 11, 1974