原文：

以德报德，以直报怨。

以德报德，是指用善良、诚实、宽容的品质来回报别人的善良、诚实、宽容。这种行为可以建立起互相尊重、理解和信任的关系，促进人与人之间的和谐。

以直报怨，则是指用坦诚、直接、公正的态度来回应别人的怨恨或不满。这种行为可以避免误解和矛盾的进一步扩大，也可以让对方认识到自己的错误或不当行为，从而改正自己的错误。

总的来说，以德报德以直报怨的做法，是一种积极、成熟、智慧的处世之道。它可以让我们更好地处理人际关系，建立起和谐稳定的社会环境。

翻译：

To repay kindness with kindness, and to respond to grievances with honesty.

To repay kindness with kindness means to use qualities such as kindness, honesty, and tolerance to repay the kindness, honesty, and tolerance of others. This behavior can establish a relationship of mutual respect, understanding, and trust, promoting harmony between people.

To respond to grievances with honesty means to use a frank, direct, and fair attitude to respond to the grievances or dissatisfaction of others. This behavior can avoid further misunderstanding and conflict, and can also help the other party recognize their mistakes or inappropriate behavior, thereby correcting their mistakes.

Overall, repaying kindness with kindness and responding to grievances with honesty is a positive, mature, and wise way of dealing with life. It can help us better handle interpersonal relationships and establish a harmonious and stable social environment.