Theoretical knowledge that we have got a particular type of relationship with God, that you cannot deny. Anything, whatever you have got in your possession, you have got some particular relationship. Suppose you are Americans, we are Indian. So we have got some particular relationship with the state. I am Indian citizen, you are American citizen. So relationship must be there. You are sitting here. There is some relationship. Suppose my students, they have got relationship with me. I am their teacher, they are my disciple. Or if you are not my disciple then you are audience, I am speaker. Must be there some relationship.
So similarly, if with everything we have got some relationship, why not with God? There is. That is practical relationship, but we have forgotten. We have forgotten our relationship. And yoga means to connect, to reconnect that relationship again. That is called yoga. Yoga is not a mental speculation or for health's sake. Oh, for health's sake you may not go to the yoga system. If you simply adopt the practice of Sandoz exercise you can become very healthy, very strong. There is no need of . . . yoga is different thing. Yoga means concentration of the mind towards God, towards Paramātmā, which we have forgotten now.
At the present moment, although we remember sometimes there is God, but actually, due to the influence of external energy, or the material energy, we have forgotten. So we have to establish, reestablish our forgotten relationship.