The proposed textbook takes the students into a fascinating journey that shows the universal aspect of chemistry: chemistry is the window given to mankind to glimpse into his material-chemical essence and come to terms with its limitations. In the introductory chapter/lecture, the textbook discusses the connection between the chemical matter and love, sex, depression, addiction--all the properties we call human. As we are made of chemical matter, this chapter makes a point why knowledge of chemistry is so essential to mankind. This preamble is followed by about 14 short chapters/lectures, which introduce chemistry as molecule building process, like a game of lego.