Fasting confirms our utter dependence upon God by finding in Him a source of sustenance beyond food.
Dallas WillardYou have established the earth and it continues. All things stand this day according to your directions. For all things are your servants (Ps. 119:91). God himself loves the earth dearly and never takes his hands off it. And because he loves it and it is good, our care of it is also eternal work and a part of our eternal life.
Dallas WillardUnless you have already put God first, for example, what you will have to do to be financially secure, impress other people, or fulfill your desires will invariably lead you against God's wishes. That is why the first of the Ten Commandments, “You shall have no gods who take priority over me,” is the first of the Ten Commandments.
Dallas Willard