I would like to ask you about exterior derivative. I have found the exterior derivative very difficult to visualize. Does it have anything to do with the ordinary derivative of a scalar function? What I mean is that the ordinary differentiation is the rate of change of the scalar function with respect to the variable. So the exterior derivative is also the rate of change of something? Or it is entirely something else? It simply doesnt seem to me that way. How can I visualize taking exterior derivative of a 1-form is a 2-form?