The speaker's ability to ok persuasive, sound persuasive, and act in a persuasive way, to show that people can trust that his side of the opinion of the subject is more important.
D …. Before he worked in a bank he had alway wanted to get a job in bank
In order to have a sentence with an active voice, you need to have to have the main subject perform an action.
"The revision (subject) gives the sentence (action) an active voice."