Thoughts exchanged is knowledge gained.
So if a student keeps his desk in an orderly position it is a good habit as he will not have to struggle for looking to his things.
It does not seem to have any relation with his seriousness towards the studies.
Knowledge is power.
The stronger a light shines the darker are the shadows around it.
Most of the serious people keep their books in good condition as they care more for them more than others. But that doesn't mean that they are studious. It's just a matter of habit they inherit from their parents.
My son is not studious and his books always remain in the worst condition and his study table always remain in an improper way. It's just a myth if you have read it somewhere.
" The two most important days in your life are the day when you are born and the day you find out why? "
– Mark Twain
Those who do not study will rarely visit their study desk and thus, it will seem well organized all the time. Their books will seem as if they are newly purchased even at the end of the term. However, it is not true. One can easily find studious students keeping everything neatly organized whether it is their study desk or their books.