As your attorney, I will argue persuasively on your behalf.
Important occasions arise when my job will is to persuade someone in a position of authority to favorably exercise power on your behalf.
Examples of such occasions might be:
As an experienced criminal defense lawyer, I have developed many skills: negotiation, strategic thinking, brief writing, legal reasoning, jury selection, cross-examination and oral argument.
Each skill involves the earnest use of logic and emotion, trying to persuade people in positions of authority to exercise their power in your favor.