Understanding the definition of mind is crucial for balancing our sensitivity. It enables us to see that regulating the factors that accompany our mental activity changes our personality and experience of life. When we successfully develop balanced sensitivity, our mental activity of producing appearances and engaging with them is free of all stains. It becomes like clear light. The following four exercises accustom us to the general features of mental activity and familiarize us with the qualities of its clear light nature through the five types of deep awareness comprising what we can call “understanding.”