Influence - Science and Practice - The Comic Quotes

“A person can trigger a feeling of indebtedness by doing us an uninvited favor (Paese & Gilin, 2000). Recall that the rule states only that we should provide to others the kind of actions they have provided us; it does not require us to have asked for what we have received in order to feel obligated to repay.”
― Robert B. Cialdini, Influence - Science and Practice - The Comic