It dawned on me yesterday in meditaiton that sentient beings sow karma in the mind and reap karma in the mind, which today is self evident. And today while writing this down I remembered the fifth patriarch’s stanza to Hui Neng, the sixth patriarch.

Sentient beings who sow the seeds of enlightenment
In the field of causation will reap the fruit of Buddhahood.
Inanimate objects void of Buddha-nature
Sow not and reap not.