I take this to mean that we shouldn't start and then stop for periods of time. If we take a long break from simran than the churn (that shaanti, that focused surti, that anand from Naam) could be lost. This is why so many don't make it anywhere. When we are motivated we push ourselves, when motivation wanes we start indulging in the world and fail this test repeatedly. This is what happens to me. Then we have to make efforts to rebuild that shaanti, that focus, that anand...