How does Rule 1.3 define a lawyer's duty regarding diligence?

The duty of diligence outlined in Rule 1.3 emphasizes the obligation of a lawyer to act with reasonable diligence and promptness in representing a client. This means that a lawyer must take all necessary steps to ensure that a client’s interests are actively pursued and that their cases are handled without undue delay. Diligence is essential in maintaining the trust and confidence of clients, as well as in safeguarding their legal rights and interests.

The phrase "reasonable diligence" indicates that the lawyer must not only be active but also pragmatic, balancing their workload and resources effectively to meet their client’s needs. This encompasses timely communication, thorough preparation, and a commitment to following through on obligations, which is central to effective legal representation.

The other choices do not accurately reflect the complete essence of diligence as defined by the rule. For instance, acting with care and thoroughness, while commendable, does not fully encompass the expectation of promptness that is crucial in legal practice. Likewise, restricting a lawyer's focus to cases of personal interest or prioritizing larger cases undermines the professional obligation to provide diligent representation to all clients, regardless of the case's size or appeal.