Law School Discussion

Should the essay be about personal reasons for becoming a lawyer?

One admissions consultant says no:

"Very few  admissions officers look for your motivation for studying law. They know that very few applicants have a good reason for choosing it. Those who do ask don't want to hear "I like to argue." They also don't want to hear "I want to save the world" unless there is substantial evidence in your file supporting this: extracurricular activities and internships in the field you mention, for instance.

They do want to hear something thoughtful about how you decided law will enhance your life's goals. As in all other parts of the application, honesty will serve you best."

What do you think? 

Also, I don't understand how the consultant's advice can be followed.  What does the consultant mean by: "They do want to hear something thoughtful about how you decided law will enhance your life's goals."