Universe

We are here on earth, because God needs us.

The question 'Why are we here on earth?' can be answered in two steps:
1) First of all we will have to know as to whether there is any God or not;
2) If we can somehow come to know that there is a God, then we can further ask the question as to why he created the universe.

When we will have the answer to this question, we will also come to know as to why the universe exists, why we exist, or why we are here.

The above two have already been answered here1 and here2 respectively.

John Zande, a militant atheist, in a blog post Why? A Challenge to all Believers (December 4, 2015)1 has put this question to all believers:

Why did your God create this universe?

I think there are at least three cases where science has gone wrong so far.

In the year 2010 scientist Lawrence M Krauss wrote an article in Wall Street Journal1 in which he had argued that as the total energy of our present universe is found to be zero, so from this it can be concluded that it must have originated from nothing. The gist of his argument is something like this: Let us suppose that the universe has actually originated from nothing at all. Then in that case the total energy of the universe would obviously be zero, because here everything has started from zero or nothing.

From Einstein’s special theory of relativity we come to know that matter and energy are equivalent. Matter is concentrated energy and energy is diluted matter. Again from GTR we come to know that space, time and matter are so interlinked that there cannot be any space and time without matter. Similarly there cannot be any matter without space and time. So we see that all these four are interlinked; we cannot think of any one of these four entities singularly, isolatedly. Whenever we will think of energy, we will have to think of matter.