All answers are great and I totally agree.
Another way of putting it. Indifference arises from ignorance, equanimity arises from Wisdom.
Indeed indifference arises from ignorance.
From ignorance arises:
bias liking = This or that is ignorantly identified as a cause for happiness (money, work, health, children...) = attachment = I like/I want =
desirebias dislike = This or that is ignorantly identified as a cause for un-happiness (money, work, sickness, children...) = rejection = I don't like/I don't want =
aversionbias neither like nor dislike = This or that is a cause for a neutral result = I don't see it as benefiting me nor harming me = I am not attracted, nor disgusted = the object is neutral = because of that, my emotions towards the object is:
indifferencethus 3 categories of objects:
1. I like ignorantly,
2. I don't like ignorantly,
3. and I am neutral towards.
Now, let's count in our lives, how many beings we have in each and let's see which category IS, by logic, the most important?