Maths and the related sciences help "build" the outer world, help us understand the basics of logic. Arts help "build" our inner world, they enlarge our mental horizons and enhance abstract thinking.
Can we say that one group of sciences is more important than the other? If yes, which group? Why?
The question comes from a certain school where music and visual arts aren't as respected as maths and chemistry, even though the school is called "high school of humanities".