“Neither Increasing nor Decreasing” is a concept in Buddhist teachings that refers to the state of equanimity or balance. It is one of the Four Immeasurables, which are loving-kindness, compassion, sympathetic joy, and equanimity.

Equanimity, or upekkha in Pali, means to remain calm and balanced in the face of changing circumstances. It is the ability to remain peaceful and composed regardless of whether we encounter favorable or unfavorable conditions.

In the Buddhist context, “Neither Increasing nor Decreasing” refers to the equanimity that arises when one is free from attachment and aversion to pleasant and unpleasant experiences. It is the state of mind that is neither overly elated nor dejected by the ups and downs of life.

In other words, the practice of “Neither Increasing nor Decreasing” involves cultivating a mind that is free from grasping and clinging to pleasant experiences and rejecting or avoiding unpleasant ones. This allows one to remain steady and undisturbed in the face of life’s challenges and joys.

Source: https://chat.openai.com/chat

Reference: http://www.buddhism.org/Sutras/2/Sutras37.htm