Because this nature of mind is destroyed by trying to understand it:
If it should be examined, it seems to be non-existent.
But if it is not examined, it is always there.
Within this primordial essence whose nature is non-dual,
There is no conception of accepting or rejecting.
There is no good and evil. There is no hope and fear.
How could this be by examining and analysis?
Shun the inconstant crowd whose minds are in the three times.
If with many analyses and examinations we examine the mind, it seems that it does not exist. When unexamined, it does not exist either. Therefore it is natureless. Without accepting, rejecting, hope and fear, be at ease like a destitute bhramin who has gotten an elephant. As for the instruction of being naturally in that state of non-aggression without view, thought, examination, memory, and wish, Saraha says:
If having gotten an elephant, one puts the mind in order,
If it cuts off coming and going, it will be at leisure.
In realization like that there is no place for defilement,
By shameless “skillful” ones this is not realized.
By letting loose the elephant of mind,
All the stains of ego are destroyed.
Like drinking water in a picture in space,
Let the borders be just as they are.
When the powerful elephant is in hand,
By killing it how will autonomy appear?