"Four sublime states of mind have been taught by the Buddha:

Love, or loving kindness (mettā)
Compassion (karuṇā)
Sympathetic Joy (muditā)
Equanimity (upekkhā).

In Pali, the language of the Buddhist scriptures, these four are known as Brahma-vihāra, a term which may be rendered as excellent, lofty, or sublime states of mind; or alternatively, as Brahma-like, god-like, or divine abodes.

These four attitudes are said to be excellent or sublime because they are the right or ideal way of conduct towards living beings (sattesu sammā paṭipatti). They provide, in fact, the answer to all situations arising from social contact. They are the great removers of tension, the great peace-makers in social conflict, and the great healers of wounds suffered in the struggle of existence. They level social barriers, build harmonious communities, awaken slumbering magnanimity long forgotten, revive joy and hope long abandoned, and promote human brotherhood against the forces of egotism.

The Brahma-vihāras are incompatible with a hating state of mind, and in that they are akin to Brahmā, the divine but transient ruler of the higher heavens in the traditional Buddhist picture of the universe. In contrast to many other conceptions of deities, East and West, who by their own devotees are said to show anger, wrath, jealousy, and “righteous indignation,” Brahmā is free from hate; and one who assiduously develops these four sublime states, by conduct and meditation, is said to become an equal of Brahmā (brahma-samo).

If they become the dominant influence in one’s mind, one will be reborn in congenial worlds, the realms of Brahmā. Therefore these states of mind are called god-like, Brahma-like."

Nyanaponika Thera