"To keep a lamp burning, we have to keep putting oil in it." Mother Teresa

I do not the know context of this quote, and probably Mother Teresa was speaking of our prayer life.  That in order to deal with the challenges and drudgery of this life, we need to fuel our connection with the Divine.  We also need to put the right fuel in our bodies:  the right food, the right thoughts, the right movement.  Nutritional food and thoughts feed our bodies and keep us going.  Opportunities for movement on a regular basis keeps our bodies, including bone structure, strong and healthy.  To keep going, we need to attend to all aspects of our life:  physical, mental, cognitive and spiritual -- and to use appropriate fuel to restore these aspects.