In my course of rheology conveyed to the graduate course students, I had a class dedicated to basics of Brownian motion and derivation of the Einstein’s equation for the diffusion. At that occasion, I noticed that some students did not know about the great contributions by Einstein for soft-matter physics. This article would be nice to see the contributions. I wish to add the other paper on the Einstein’s relation for viscosity of suspensions, which is certainly important for pigment inks for example. Nevertheless, the article lists 4 things and 2 of them are related to soft-matter physics.