The 14th-century Tibetan master Longchenpa said there are five characteristics we should cultivate in order to practice the four immeasurables:

(1) A fundamental attitude as vast as space;

(2) A mind as constant as the depths of the ocean;

(3) Seeing all occurrences, inner and outer, as mist floating in the sky;

(4) A compassionate attitude as even as the rays of the sun;

(5) Sensing negativities to be like specks of dust in our eyes.

Buddhadharma: The Practitioner’s Journal, 2019 The Four Immeasurables Leave Nothing Untouched