Confused on loading page content

I’m building my first full site into WP and I am rather confused on the process involved to load the content you enter via the WP Pages editor into the actual page.

For example, I am having a static home page and I have this in index.php of my theme file.

// Output header
get_header('home');

// Start Code that wraps the content

***** Content of the page ******

// End Code that wraps the content

get_sidebar();

get_footer();

Now the “Content of the page” should be the code/content that the user has control over via the WP Admin Pages menu.

How do I get this into the page? I have read you need to do something like this..

if (have_posts()) {

    /* Start the Loop */

    while (have_posts()) {
        the_post();
        get_template_part('content');
    }

}

But I’m confused as this uses another content page yet again (content.php). Why do I need to create another content page when all I need is the code/data from the pages content area? I don’t need to add any more coding myself.

Thanks!