On the surface, this seems like an easy question, but can actually trip up a number of people. Answering with “To make a difference” may certainly be true, but your answer should mention something specific that motivated you to pursue a legal career. Give a detailed and dynamic answer that is both truthful and sets you apart from others. Perhaps there was a mentor who inspired you or a job that sparked your interest – you should feel comfortable discussing why you decided to go to law school. While it is important to include details, be careful not to ramble; being articulate may separate you from other candidates.