Verses On Changing Karma
Due to having collective karma, others suffer [and] I suffer, others [have] joy [and] I [have] joy, [with our] suffering [and] joy interdependent.
For all practising repentance, mindfulness [of] Buddha [and] dedicating merits, self-eradicating [my negative] individual karma, also changes [our] collective karma.
Example of the above principle working:
How Nianfo Improved Relationships With Our Children