Man does not live by bread alone
Day after day, believers are confronted by circumstances and propositions that are similar to what Jesus went through when he was tempted by the devil in the wilderness. Day after day believers are being called upon to make difficult choices based on circumstantial events going on around them. The people who are called by God's name daily are faced with conditions that appear so overwhelming and impossible to resist. Pressed for some form of response, the people of God react on daily basis to these conditions but sadly, many do so outside of the will of God as revealed through the word of God.
The full picture of what you are confronted with is incomplete without the perspective which the the word of God provides, this is why man does not live by bread (circumstantial or physical inputs) alone, but by every word that proceeds from God. You cannot respond to any challenge or accept any proposition or believe any report or embark upon any venture without first cross checking it with the word of God.
As believers the question that we need to always ask irrespective of the circumstance we find ourselves is this: "What does God through his words have to say about this?"