Here we have to practice to become siddha, perfect. But there, in the Siddhaloka, they are so perfect that they can go from one planet to another. The yogis can go, but they are born yogis. This is described in the Srimad-Bhagavatam. We have seen in this Second Canto, there is Siddhaloka. So many planets are there, so many opulences are there, that it cannot be compared. And there is description. So one planet to another, or one planet to the Sumeru hills, there is long, millions of miles, made of gold. They are gold. Similarly copper. Similarly, there are different oceans. Now, we may not believe, but there is no question of believing. You cannot say, “There is no such thing.” But we can say because we get the information from the sastra. You have no evidence, so you cannot say “No.” You can say “maybe,” but we don’t say “maybe.” There is, because we get the information from the sastra.

From Srila Prabhupada’s lecture on Srimad-Bhagavatam 6.1.33 — July 18, 1975, San Francisco