From the Vedic traditions, the ancient mystics, seers and rishis discovered that there are 3 gunas (qualities or zones) of being that are constantly playing in our life.
The first is Tamas which is the state of fewer–thoughts-fewer-actions, i.e. the state of dullness or inertness. The second state is more-thoughts-more-actions, the state of restlessness or hyperactivity which is called Rajas. The final guna is the fewer-thoughts-more-actions i.e. the state of inner balance, restful awareness and a feeling of being “alive” which is called Sattva.
In an ideal flow of day of a typical human being, we should experience Sattva in the morning, Rajas in the afternoon and Tamas in the evening before we rest our body-mind into deep sleep. However, if you look at our modern civilization in the digital age, you see a disturbing picture because the state of Sattva is very lacking in our city life.