Yoga practice is more or less material activity. Because when they are powerful to show some miracles and people become captivated, "Oh, he is performing such miracle thing." In Benares in India there was a yogi. His business was anyone who will go there, he immediately produced two or four rasagullas and offer him. And many hundreds and thousands of educated men became his disciple simply for the matter, rasagulla, which is only four annas worth. So people want to see this jugglery. And those who want following some or some material achievement, they want to show. Actually it is a fact. Suppose if I could manufacture rasagullas by some mantra, Hare Krishna mantra, oh, thousands of people will come immediately. You see? People want to see me, and those persons who want to have a cheap following, they want to show such jugglery. But a devotee sees is not of that mentality. They will simply, humble servant. They are satisfied by serving the Lord. That is devotee's position. (Srila Prabhupada, September 6, 1968, New York)