State of slight urgency

I went to the doctor and stepped on the scale.  I gained about 2 pounds.  I have been praying for the motivation, wisdom, and strength to lose weight.  I have barely lost the weight.  I have been mostly gaining.  I know that I need help.  Here is my plan.  I will walk for 10-20 minutes tonight, which may be too late.  I will also walk for about half an hour tomorrow.  I want, need, and desire to be healthy, but I have to wonder. What is my real goal?  Why do I really want to lose weight and be fit?  Why is it so important to me?