We secure our friends not by accepting favors but by doing them.

The saying contrasts two ways of forming bonds: passively receiving benefits versus actively giving them. It suggests that friendship is more securely grounded in generosity and initiative—doing good creates gratitude, trust, and a sense of mutual obligation—whereas merely accepting favors can leave one dependent or indebted without building genuine attachment. The thought also reflects an ancient Greek emphasis on reciprocity (charis) and the social power of benefaction: giving can establish durable alliances and reputations. Even if later attributed to Thucydides, the maxim’s enduring appeal lies in its practical moral psychology: people often feel closer to those they have helped, and communities cohere when members contribute rather than only consume.