Do you want to be excellent at running and win competitions? Let us say that you are a runner or any other athlete of a discipline you want to achieve mastery in. You decide to practice running every day and sometimes twice a day. You push yourself to the limit every time you run, but no matter how much you practice your results seem to get worse. Why?
The answer is quite simple; all training is degradation of the body. It is simple logic; if you use something it will degrade. If you use the same shirt every day for one year then it will be worn out; the shirt will degrade. So will you if you keep training twice a day. The difference between you and your shirt is that you can regenerate and the shirt cannot.
How do you increase the service life of your shirt? You take care of it by cleaning it, repairing it and most importantly, you wear other shirts. You do not have just one shirt you have several shirts in different colours and designs. The same goes for your body. You have to give your body rest to regenerate; it is called the recovery phase and is a very important part of all training.
When you give your shirt a rest you wear another shirt because you cannot run around half-naked. If you want to achieve running then you have to practice something else while recovering from running. That is why you need to plan training carefully to optimise training.
The principle applies in all aspects of your life!
Okay, you do not want to be a world champion in some athletic discipline, but the principle applies anyway. In every aspect of your life you have to remember the recovery phase! If you want to achieve anything today, tomorrow, next week and in your life then you have to optimise your tasks and incorporate rest to recover.
If you do not make time for recovery you will get stressed and worn out; you will feel tired and it will be difficult for you to focus. The meaning of life will seem difficult to find. You do not have to sit and do nothing to recover. Variation in you routines is enough. Of course, you have to fulfil some basic needs like sleep, diet and exercise, but variation is a very important part of development. When you work on your development in all aspects of your life then you will achieve more.
I found an interesting article on the net about mastery and relaxation that I recommend reading.