The way to love anything is to realize that it might be lost. — G. K. CHESTERTON T - Robert B. Cialdini

Once we have made a choice or taken a stand, we will encounter personal and interpersonal pressures to behave consistently with that commitment. Those pressures will cause us to respond in ways that justify our earlier decision.

But the rule for reciprocation, which states that those who give first are entitled to receive in return,

The rule says that we should try to repay, in kind, what another person has provided us.