When people keep thinking about every miserable ordeal, getting upset, or being unhappy, they gain nothing. Isn't it preferable to spend valuable time and energy on something more worthwhile and productive? It's only feasible when people know how to silence their minds and remain peaceful.
Silence of the mind does not mean that people are not thinking, they are not concealing their impulses, or that their mind is blank. A silent human mind is loaded, not empty. A silent mind has no feelings of attraction, cravings, or commitments since it is not analyzing, commenting, or judging.