Point that struck me most: 爱因斯坦说:“复利是宇宙间最强大的力量,复利是世界第八大奇迹。” Basically it's a chain reaction: "A -> B -> A -> B ..." For example, you wrote an article -> people share it -> more people read it -> more people share it -> more people read it.... or you buy Google ads for your website -> more people click it -> your website moves up the rank of search results -> more people click it....
This made me think about Warren Buffett, who keeps getting richer with his success in investments. I guess this is one of the key factor that determines whether you are the poor getting poorer, or the rich getting richer.