Role of upādāna in generation of suffering - Fire imagery and vedic background; Text of S 44,9 / S iv 398; Explaining the specifics of the 4 forms of grasping (attavādūpādāna) touched only briefly.
The flavor of Metta is kindness, which is such a beautiful and powerful attitude, but the other Brahma Viharas of compassion, joy and equanimity allow us to meet all of life with openess and connection.