Rest is required for growth...
One of the hardest things to do during my marathon training is to take a rest day! I'm not sure what it is, but I feel like taking 1-2 days off per week is going to be detrimental to my race. I've come to realize that if I don't take some days off, I will more than likely injure myself, which is slightly more detrimental. Taking the days off allows my body to rest and recover so I can continue to build upon the muscles and stamina that I've been strengthening.
Training for the marathon is continuing to build upon your past training. In the beginning of the training cycle I'll add about 10% to the previous week's mileage, and continue to build over the next few months. When I get to the start line, I trust my training; I trust that the work and rest I've put in over the last 6 months will carry me through to the finish line.
Similarly, in life, we're building upon something. What are you building upon? Can you trust that foundation? When was the last time you checked your foundation for any weaknesses? There have been times in the past where I've felt like I've had to tear up some of my foundation because there are some weaknesses, or lies that I may have believed. Tearing up the foundation is painful, and a lot of work, but it's needed to address the weaknesses. Not only can you repair the foundation, but it's also possible at that point to expand the foundation, whether you're widening it, or deepening it to build something bigger & stronger.
When it comes to laying the new foundation, first make sure you're laying down the right mixture (make sure it's full of truth), and make sure you're giving it time to set properly. Letting the foundation properly set is key to making sure it's as strong as it can be! There are other things that can be done during this "rest" period, but don't try to build on top of a foundation that is not fully set as it will lead to problems in the future.
During my rest days, I take some time to stretch, go for a walk, and sometimes I just sit on the couch and read a book. As long as I don't finish a whole box of chocolates on the couch, the rest day is so important for my training. It's very important to your daily walk too! Don't forget to take care of yourself, mentally, physically and spiritually. Find the truths that matter to you. Find the values that you want to live by, and build upon that. First make sure those truths and values are set in your heart, so you won't get led astray by someone else, and then begin to build something beautiful.