Unselfish Joy! How to Rejoice in Other's Success:
Mutual Joy (Muditā) is developed by seeing that:
If only happy at one's own success, such egoistic Joy is rare and limited!
If happy at all other's success also, this Joy is more frequent & even infinite!
By observing that:
It starts with basic sympathy, develops into acceptance, genuine approval,
& appreciation. It culminates in rejoicing altruistic gladness by directing
mind to initiation, much cultivation and boundless expansion of Mutual Joy!
By knowing that:
Mutual Joy is the proximate cause of sweet, fully satisfied contentment!
Lack of mutual joy is therefore the proximate cause of discontentment!
Mutual Joy instantly eliminates acidic jealousy, grudge and green envy!
Mutual Joy is an infinite, truly divine, elevating and sublime mental state!
Mutual Joy is 1 of the 4 mental states of the Brahma-devas (Brahmavihāra)
The Blessed Buddha pointed out:
If it were impossible to cultivate this Good, I would not tell you to do so!
See how this worthy being is very Happy!
How fine! How excellent! How sweet!
Let there be Happiness. Let there be open Freedom.
Let there be Peace. Let there be Bliss from cultivating this.
Let there be Understanding of this mental state of Mutual Joy!
Cultivation of Mutual Joy is the specific medicine against Envy & Jealousy:
Muditā: The Buddha's Teaching on Unselfish Joy: BPS Wheel Publication No. 170
4 essays by Nyanaponika Thera, Natasha Jackson, C.F. Knight, and L.R. Oates
Have a nice & noble day!