Thoughts are a complex concept that can be broken down into several different categories. EMOTIONS are feelings that can be experienced in response to certain events or situations. Images are visual representations of something, such as a photograph or a painting. Concepts are abstract IDEAS or theories that can be used to explain or understand something. OPINIONS are subjective beliefs or judgments about something. IDEAS are mental images or concepts that can be used to create something new. CONCEITS are clever or witty IDEAS that are used to make a point.