When we enter into the vibration of Metta, loving kindness,
all the suffering that we carried, conscious and unconscious, evaporates, and we come to an instantaneous realization that we can be the source of metta, loving kindness, for others. The relief that that causes to the mind and heart is beyond words.
Metta is loving, and metta is fierce.
When we are aligned with the separate self, we are constantly hungry for some sort of ego gratification -- and much of that hunger is so patterned that it operates completely under the level of consciousness. All of this melts away when we willingly enter into the fierce discipline of metta. If this sounds appealing to you, then my guess is that there is something familiar in it... You have felt this before.