Mirror neurons are a type of brain cell that is activated both when performing an action and when observing another individual perform that same action, a process thought to help an individual recognize or understand the behavior of another. Mirror neurons were first discovered in the brains of macaque monkeys in the 1990s; since then, similar neurons have been identified in the brains of birds, mice, and, perhaps most notably, humans.| Psychology Today
Meditation is a mental exercise that trains attention and awareness. Its purpose is often to curb reactivity to one's negative thoughts and feelings, which, though they may be disturbing and upsetting and hijack attention from moment to moment, are invariably fleeting.| Psychology Today
Altruism is acting to help someone else at some cost to oneself. It can include a vast range of behaviors, from sacrificing one’s life to save others, to giving money to charity or volunteering at a soup kitchen, to simply waiting a few seconds to hold the door open for a stranger. Often, people behave altruistically when they see others in challenging circumstances and feel empathy and a desire to help.| Psychology Today