Persistence versus Consistency

I have been focused on the consistency thing and how it differs from persistence. Dictionary.com defines Persistence as “the continuance of an effect after its cause is removed.” Which one is more important? Persistence will help you to achieve a goal however if you're not consistent you will revert to old habits shortly after you accomplish it. Consistency, on the other hand, will cause you to continue long after you have reached the goal. Consistency or persistence. Which one do you choose? It's about making a lifestyle change.