Physics.

Sometimes I want it but sometimes I don't, 

Sometimes I'm all excited but sometimes I don't,

Sometimes I have so much interest in it but sometimes I don't, 

Sometimes it's clear but sometimes it's not, 

I don't want to be lost. 

I have once heard a person saying this, 

"Do you like physics?" 

"Why?"

"Physics said, when things are pressured, they find space" 

I guess I need that "space".