Mind is the forerunner of all (evil) conditions.
Mind is their chief, and they are mind-made.
If, with an impure mind, one speaks or acts,
Then suffering follows one
Even as the cart wheel follows the hoof of the ox.

Mind is the forerunner of all (good) conditions.
Mind is their chief, and they are mind-made.
If, with a pure mind, one speaks or acts,
Then happiness follows one
Like a never-departing shadow.

_Dhammapada