Power is defined as ability to influence others. Apparently looking very simple, notion of power is highly complex and difficult to comprehend. Entities which apparently look very powerful are usually weak and vice versa. The key is psychologically humans reject any symbol of power as it threaten their survival. So the power of the powerful become its weakness while weakness of the weaker become its power.
Apparently quite weak, children proved more powerful than adults in so many matters. Syrian conflict was changed by the images of children not by the so called powerful members of EU parliament.
Regret has always been powerful than the gratitude. That’s why we start caring about the people after they leave us.