The more you are personal, the more you are grief-stricken

In your sleep your personality goes completely, and you become impersonal. There is, however, a seed of personality potentially present even in sleep, on account of which you wake up the next morning. For all practical purposes your personality is wiped off, and so it is that you are very happy in sleep, indicating thereby that impersonality is the source of happiness, that personality is the source of sorrow. The more you are personal, the more you are grief-stricken. The more you become impersonal, the more you become happy.

-Swami Krishnananda