Concept: A concept is an abstract idea or general notion that represents something specific. For example, the concept of love encompasses feelings of affection and care towards another person.
Thought: A thought refers to the process of forming ideas, opinions, or beliefs in one's mind. It involves cognitive processes such as reasoning, memory, and imagination.
Understanding: Understanding is the ability to comprehend or make sense of information or concepts. It involves grasping the meaning or significance of something.