In years past I was a pretty good runner. I did a lot of races and won a few trophies. I enjoyed running and it kept me in pretty good shape. However life got busy and running was pushed to the back burner. Because I had run in my past, if I had to run I could make myself run. Usually a 5K was doable. However as more time passed running up the steps became taxing. What happened? I was out of shape. How did it happen? It happened one day at a time. How do I get back to where I once was? The answer is one day at a time. Muscles have memory. It won't be easy but it is possible. Start by going for a walk.
It is much the same with being in shape spiritually. Read your word daily and use the word on a daily basis and spiritually you can run a 5K. Want to do a marathon it is going to take a lot more training. You will need to put in some long runs weekly in order to finish that marathon. You will not need to run 26 miles 2 days a week or even once a week but you will need to get close. The rest of your body may need to be worked on as well. Lifting weights to develop the arms will help a lot come marathon day. So it is not sufficient to just read the word for 5 or 10 minutes and once in a while slip in a daily devotion. Reading the word had to be a discipline and there have to be some long periods where you are in the word to the point you get this second wind that tells you, you could stay here all day. This kind of study and time in the word comes over a period of time, but it begins with a walk through the word.
Start walking today. Life is not a sprint it is a marathon. It is not run in a day but over a lifetime. In order to finish this race successfully you will need to be so immersed in the word of God that when you sweat the world will see you sweat the word. There is no better time to start than today. Today you begin the race of a lifetime one step at a time.
Hebrews 12:1-4 (KJV) 12 Wherefore seeing we also are compassed about with so great a cloud of witnesses, let us lay aside every weight, and the sin which doth so easily beset us, and let us run with patience the race that is set before us,
2 Looking unto Jesus the author and finisher of our faith; who for the joy that was set before him endured the cross, despising the shame, and is set down at the right hand of the throne of God.
3 For consider him that endured such contradiction of sinners against himself, lest ye be wearied and faint in your minds.
4 Ye have not yet resisted unto blood, striving against sin.