We say that it is because of gravitational force. It is observed in many events happening around us. If you succeed in isolating then it is no higher level for you. In addition, again you are at same point where you left. So, the understanding of the higher things is based on observations only.
Earth revolves around sun, moon around the earth.
With these observations you conclude lighter objects revolves around heavier one and you do not attempt to further analyze it because in analogy you being the lighter object revolving around higher, you are unable to analyze because you are constantly moving . A constantly moving object can not analyze a steady object. With all these feelings what you achieve is called as Bhakti. Some may say that Bhakti can be achieved without Gnana . But what I think is that if it is achieved without Gnana then it is not Bhakti but a slave of a God.