I'm going to draw during class today.
Why do you want to draw in class?
I lost my passion for art and I want to find it again.
Well the middle of class when you should be paying attention to the teacher is not the idea place to find your passion again. It might be good to wait till after class to draw again.
Who are you to tell me where and when I should develop my hobby?
It is rude to draw and not pay attention in class. You could miss valuable information if you are distracted.