content.php

<?php $the_query = new WP_Query( 'showposts=1' ); ?>
<?php while ($the_query -> have_posts()) : $the_query -> the_post(); ?>
<?php the_content(__('(more…)')); ?>
<?php endwhile;?>
        
<div id="cooler-nav" class="navigation">
<?php $prevPost = get_previous_post(true);
        if($prevPost) {?>
        <div class="nav-box previous">
        <?php previous_post_link('%link',"<p>%title</p>", TRUE); ?>
</div>
        
<?php } $nextPost = get_next_post(true);
        if($nextPost) { ?>
        <div class="nav-box next" style="float:right;">
        <?php next_post_link('%link',"<p>%title</p>", TRUE); ?>
        </div>
<?php } ?>
</div>

index.php

<?php get_template_part('templates/page', 'header'); ?>

    <?php if (!have_posts()) : ?>
      <div class="alert alert-warning">
        <?php _e('Sorry, no results were found.', 'roots'); ?>
      </div>
      <?php get_search_form(); ?>
    <?php endif; ?>

    <?php while (have_posts()) : the_post(); ?>
      <?php get_template_part('templates/content', get_post_format()); ?>
    <?php endwhile; ?>

    <?php if ($wp_query->max_num_pages > 1) : ?>
      <nav class="post-nav">
        <ul class="pager">
          <li class="previous"><?php next_posts_link(__('&larr; Older posts', 'roots')); ?></li>
          <li class="next"><?php previous_posts_link(__('Newer posts &rarr;', 'roots')); ?></li>
        </ul>
      </nav>
    <?php endif; ?>