So just try to understand that I am thinking, "I am such big man," "I am minister," "I am president," "I am this," "I am Narayana," up to the last stage, "I am Narayana." But if we soberly think that "If I am Narayana, then I must be the controller. I must be controller of everything. But why I am controlled by the toothache? As soon as there is some pain in the tooth, I voluntarily go to a dentist to be controlled by him. Then how I become Narayana?" In this way, if one studies his life, whole, that, he'll find it that he's fully controlled by something more. Fully controlled. And that control is of the material nature.
Lecture on Bhagavad-gita 7.2, Nairobi, 28 October, 1975