I have heard people break Guinness Book of record on several staters and before long someone else goes forth to do even more just to prove a point but only a few I have heard that took a vow not to eat for life.
Food is a necessity in every man's life as not eating food will lead to lots of complications. As food is to the body so is God's word is to the spirit man.
Josh.1.8 - This book of the law shall not depart out of thy mouth; but thou shalt meditate therein day and night, that thou mayest observe to do according to all that is written therein: for then thou shalt make thy way prosperous, and then thou shalt have good success.
God expects that we constantly meditate over his words on a daily basis, he is not saying we read all but let there be a constant meditation, the default state of our mind should be on God's word.
As we can't go through out the days of our lives without eating or when you eat poor diet we look malnourished so also when we refuse to eat the word we look spiritually malnourished. God's word shows us the way to everything.
Our all round prosperity comes from the word of God as God commands Joshua. Joshua is not with us any longer, it is now directing to us. To have good success in every of our endeavor we just have to learn to gain alliance in the word.
Studying the word is not an easy discipline to do, it takes a deliberate effort to achieve it. It does not have to be a complex venture but as little as a verse a day can go a long way in refining our heart.