From the book, I did not understand, 1. Why does fields coming inwards the sphere contradicts the Gauss law ? 2. I am unable to connect the potential picture and electric field picture. Why does the point P must have lowest or highest potential than neighbouring particles ? 3. I understand the fact that "potential is a function whose average value over a sphere is always equal to its value at the centre". It is because of Laplace's equation but I don't understand how this is connected here. In potential picture there is no sphere after all right ? For the first question, I think it contracdicts the Gauss law because there is a +ve inside the sphere or the field lines should be outward not inward, which results in -ve flux instead of +ve flux. Am I correct ?