Krsna's devotees do not require to practice any yogic power to become materially powerful. Their surrender to Krsna makes them all-powerful. This is the position of devotee. Devotees do not care for yogic powers. They depend on Krsna. Krsna is Yogeśvara, master of all mystic powers. So if one takes shelter of the Yogeśvara, why he should bother about yogic powers?
A poor man may try to earn money by hard labor, but one who is a very rich man's son, why should he labor? The father's money is sufficient. Similarly, a sincere devotee is under the protection of Krsna, and it means under the protection of all six kinds of opulences: riches, strength, reputation, wisdom, renunciation, and beauty.
If you get somehow or other Krsna's favor, there is no question of any more profit. You have got everything. Simply be sincere to the service of Krsna, and you have got everything. There is no need of trying for this or that. If one is situated under the shelter of Krsna's lotus feet, then if there is dangerous type of inconvenience, you will not be disturbed.
So be sure that if you have actually taken shelter of the lotus feet of Krsna, there is no question of danger. And Krsna confirms it in the Bhagavad-gita: "My dear Arjuna, you declare to the world that My devotee will be never vanquished by any enemy." That is Krsna's assurance.
(Based on Srila Prabhupada's lecture)
