The military taught me the importance of getting something done in a timely manner and the importance of completing a mission on time. My lieutenant would say, 'If you don't, you die. ' In many ways, life is the same. If you don't pay attention to a timeline, you lose out on the ability to accomplish the task at hand.
Do not disturb yourself by picturing your life as a whole; do not assemble in your mind the many and varied troubles which have come to you in the past and will come again in the future, but ask yourself with regard to every present difficulty: 'What is there in this that is unbearable and beyond endurance?'