Learning to accept loss and gain, good-repute and ill-repute, praise and censure, sorrow and happiness all with detachment, equally, for oneself and for others.
It is a clear-minded tranquil state of mind.
It refers to the equanimity that arises from the power of observation, the ability to see without being caught by what we see.
“Being in the middle” refers to balance, to remaining centered in the middle of whatever is happening.
This balance comes from inner strength or stability.
The strong presence of inner calm, well-being, confidence, vitality, or integrity can keep us upright, like a ballast keeps a ship upright in strong winds.
As inner strength develops, equanimity follows.