Hello @manu
On the blog page the posts are designed to show the image, title, post meta, and an excerpt.
Like here on our demo http://demo.themely.com/integral/blog/
If you want it to show the full post you will need to edit the archive.php and category.php files.
Edit line 73 and replace the_excerpt with the_content like you see in the screenshot linked here, https://www.dropbox.com/s/1mvygexcg9sse4i/excerpt.PNG?dl=0
