Try to understand bondage, what is bondage. We are thinking we are very . . . we are free. We are declaring that "We belong to the free nation" or "free community," or everyone is seeking after freedom. But nobody is free. Nobody is free. Everyone is under the stringent laws of nature. So bondage means to remain under the condition of material laws. That is called bondage.
Just like people are trying for so many years to go to the moon planet. The Russian and the American scientists are competing. But they are so bound up, they go some, say, thousands and thousands of miles up, again come back. Just see how they are bound up. You cannot go. So this is the nearest planet, and there are so many other planets also. So you cannot go by your whims or by your will. This is called bondage. But if you become free—when you are in spiritual understanding, then you are freed—then you can travel anywhere.
The perfect yogī, he can travel in any planet. That is freedom. That is little freedom. We have no idea what is the freedom of the spirit soul. That we have forgotten, because for . . . from time immemorial we have been bound up under the laws of material nature, so we do not know what is freedom. But there are information of the freedom, how a spirit soul can become free.