Every action has an equal and opposite reaction.
An act of kindness to somebody else is also an act of kindness to one’s own self. The same holds for cruelty.
They who bring others joy also partake in that joy. They who make others miserable are miserable themselves. They who enrich others also enrich themselves. They who feed on poverty also suffer from poverty – spiritual or otherwise.
A good person sees their own goodness reflected in others, just as an evil person considers everybody to be evil.
The most empowered among us are those who empower others.
Newton’s third law applies to all manner of actions.