The Meaning of this is that its a poem and the meaning is the sun would always shine.
having a backpack and books and going into a class?
Flair - when somebody does something with what seems natural talent. Doing something amazing
David Copperfield has a flair for captivating illusions
People can have a flair for drama, style, humor.
A knack.
Having a flair for style would mean you were not poorly dressed as a non-example.
People that practice really hard to the point of proficiency will appear to have a flair for the thing they have practiced.
Sorry for the disjointed thought stream in this post, I apparently lack the flair of organized thought today.