The Buddha’s description of the boundless nature of mettā; how we begin to access this quality where it is relatively easy and gradually open the heart to all beings
Practice as development of mettā in both formal sitting and walking meditation, as well as in general activities. Contentment with what we can do as opposed to trying to practice perfectly.
The inner stability of mettā as a refuge in this unstable world; using all of life as practice to build a continuous inclination to mettā, no matter what arises
Mettā as the antidote to and protection from ill-will and associated mindstates; using mettābhāvana to develop a habit of inclination towards benevolence.