"And the devil said unto Him, If thou be the Son of God, command this stone that it be made bread. And Jesus answered him, saying, it is written, that man shall not live by bread alone, but by every word of God." Luke 4:3-4
You need to eat. You need to breathe. You need liquids to live. You need the Word of God to live.
You need the Word of God because:
You are a spiritual being as well as physical being.
You need the information in the Bible, because the creator of all that is, is responsible for its content, and within it lays the answers to all your questions as they were pre-ordained by God.
Every word of God that you ingest into your soul will alter your condition to the positive.
You will be full of joy and full of peace in your heart.
You will have power to overcome the temptations of the world.
You will have co-creating abilities with God, so that your prayers are assisted by your lifestyle and the pre-emptive and pro-active measures necessary to bring to pass the impossible.
You will be blessed on a daily basis.
You will hear the voice of God inside your being to assist you with daily decisions.
Every facet of your life is enhanced when the Word of God is heeded.
When you are tempted, just like when Jesus was tempted, there's no way to outwit the enemy on your own wisdom; it takes the embedded Word of God, not worldly wisdom to fight evil.
If you are wondering why this seems so serious, it is because life is serious. Even though we are made for fun and laughter and true happiness, the only way to have it is in Christ. Man shall not live by bread alone, but by every Word of God.