We only have partial control over our destinies. Sometimes in life, we feel extremely passionate and ambitious towards achieving a goal. We feel the need to push ourselves beyond our normal limitations to get to where we wish. This is a great mindset to have to a certain point. We must learn to push ourselves to the point where we have nearly reached the breaking point and not burn ourselves out.
In doing so, we are not only avoiding a meltdown but are also humbling ourselves toward God. We leave room for him and understand we are never in full control of our destinies. We must also conserve energy because life is always full of new challenges and we never know when we are going to need that energy to overcome them.