Introspection is essential to mastering life. The quality of involvement in activity, and connections that come by interactions with others, cannot be assessed without careful self-reflection.
Inward focus is increasingly lost as lifestyles impose high-attention demands, without the opportunity for contemplation. Portable devices that afford texting and constant communication are introspection assassins.
The brain at rest is not idle. Constructive internal reflection is critical to contextual learning, and allowing intelligence choices for the future.