Can you live with just water? I believed yes. So if you just eat rice and vegetables then you will be very well alive as long as you take control of yourself.

Living and surviving is not just about what you eat but how you manage to watch yourself or actions everyday. You can be eating heavy meals everyday but if you are not watching and careful about your health then you probably ended up sick or injured.

Managing your life is about the behavior towards your decision. Is it alright to eat but careless about your future? There should be a balance in your life between health and actions. Because of you are eating healthy everyday but your actions are reckless and bad then you cannot manage to stay longer in this world.

I can manage to eat just corn grits and fish and vegetables with the rest of my life if that's the only available food for me to survive. I do not need several kinds of foods just to survive but I do need to be very careful about the laws in the road or in the states to keep me safe and alive a little bit longer.

But if you are not used to eat those type of meals or diet it might be very difficult for you to manage longer in your journey. You might become a miserable and unhealthy because you hates the food and you cannot take it.

It really differs in your life experiences and difficulties you are dealing with.

Some people can manage it longer for just one kind of food but for some it would be like a punishment and makes them depressed and then lead to be unhealthy. When you are concern about what you eat and that you are not satisfied with it then your brain will react to it negatively.

But if you can accept why you are eating that meals and that you have beliefs that if you do fasting you will be safe from sin. It depends of what you believed to happen in your own decisions.

I knew many people who will not eat during Lenten season but they can manage it longer because they get used to it.

When you do the fasting , you will concentrate on praying than eating and you only drink water and a light meal if you have beliefs in your mind.

But only to those people who believed in such religion or faith.

If you do not have any beliefs then you can still manage to eat rice and vegetables as long as you can afford to stand with it.

At least two weeks , you can survive just drinking holy water or eating light meals everyday for some it would be a difficult test in life.

But it is really up of what you get used to do in life.