This document provides an overview of aesthetics and design references as well as a lecture on aesthetics. It discusses the definition of aesthetics as the study of beauty and art appreciation or the philosophy of art. It examines what makes something beautiful, sublime, or disgusting from both an individual perception perspective as well as how sensitivity to aesthetics can be developed through training the senses and mind. The document also explores different philosophers' definitions of aesthetics and what aesthetics studies, with a focus on its relationship to the world.