Development of Infinite All-Embracing
Kindness!

The Blessed Buddha once said:
Bhikkhus and Friends: There are these four infinite mental states:
The Bhikkhu pervades all beings with all-embracing friendliness...
The Bhikkhu encompass all creatures with universal & endless pity...
The Bhikkhu permeates all individuals with infinite and mutual joy...
The Bhikkhu suffuses all living mortals with unlimited equanimity...
First in one direction, then in the 2nd, then the 3rd,
& finally the 4th ,
above, below, all around, in every location, unifying himself with all
beings,
he pervades the entire universe with a kind and all-embracing
friendliness,
with an all-encircling compassion & pity, with an all-enveloping mutual
and
altruistic joy, and with an all-encompassing imperturbable equanimity,
fully
utilizing a
refined mind, made great, vast, profound, infinite, immeasurable,
and released from all hate, anger, irritation, opposition and stubbornness...
Source:
DN 33

Because of hate, overwhelmed and obsessed by hate, one lives while doing
evil deeds, speaking wrong words, and thinking bad thoughts...
Thus one neither understands one's own welfare, nor the welfare of others,
nor the welfare of both oneself
and others
...
If, however, this hate is overcome and subdued, then one lives while doing
good deeds, speaking kind words, and thinking advantageous thoughts...
Therefore one really knows, what is one's own welfare, for the
welfare of
others too, and for the welfare of both oneself and others...
Yeah!
Source: AN 3:55

More on these 4 Infinite and Divine States
(Appamañña Brahma-Vihāra):
http://What-Buddha-Said.net/library/DPPN/wtb/b_f/brahma_vihaara.htm
http://What-Buddha-Said.net/drops/The_Buddha_on_Noble_Frienship.htm
http://What-Buddha-Said.net/drops/Selfless_Friendship_is_Sweetest.htm
http://What-Buddha-Said.net/drops/III/All_Embracing_Kindness.htm
http://What-Buddha-Said.net/drops/Rejoicing_Bliss_is_Mudita.htm
http://What-Buddha-Said.net/drops/II/Blazing_Friendliness.htm
http://What-Buddha-Said.net/drops/II/United_in_Harmony.htm
http://What-Buddha-Said.net/drops/II/The_Good_Friend.htm
http://What-Buddha-Said.net/drops/III/Goodwill_Encore.htm
http://What-Buddha-Said.net/drops/II/Blazing_&_Bright.htm
http://What-Buddha-Said.net/drops/Friendliness_Frees.htm
http://What-Buddha-Said.net/drops/II/Kalyanamitta.htm
http://What-Buddha-Said.net/drops/Metta.htm
