[denton-scratch]

"Equanimity" is also a practice (it's been mentioned up-comments). It doesn't mean "calmness" or "imperturbability", in this context.

One form of the practice would be to consider those to whom you feel most warmly, and reflect that in previous lives they might have murdered you. And to consider those you hate, and reflect that in a future life, they might be your mother. This is supposed to reduce attachment and aversion.

(That formulation depends on the idea of rebirth, but I'm sure formulations exist that don't depend on metaphysical speculations)

There is a whole bunch of practices that are supposed to work together with mindfulness. Getting the balance wrong can lead to depression, panic attacks and other disturbances.

> Personal mindfulness is not and never has been the basis for anything other than self-aggrandizement.

Well, that's an opinion, rather strongly expressed, but without evidence. I happen to disagree; like you, I decline to present evidence.