Those who wish to keep the trainings
Must with perfect self-possession guard their minds.
Without this guard upon the mind,
The trainings cannot be preserved.
Wandering where it will, the elephant of mind,
Will bring us down to torment in the hell of Unrelenting Pain.
No worldly beast, however wild and crazed,
Could bring upon us such calamities.
If, with mindfulness' rope,
The elephant of mind is tethered all around,
Our fears will come to nothing,
Every virtue drop into our hands.
~ Shantideva
from The Way of the Bodhisattva