It can be seen in some diligent students also . As you can not expect every day you are so energetic and happy to work . But rather  , hard working people will find the good cause to brace up to move on and lazy people always excuse to do nothing for their tardiness .

Don't worry

we have the same feeling

Think that there are others who would like to study but they can't (no money) and think how luky you are. 

Sometimes i regret why I enrolled haha..