I was always fascinated with it, maybe because it reflects the fundamental principal of life. Take man and woman, these two entity are needed to create life. In a student life, you need to have a balance of studies and enjoys. In Malaysian education system, a student must be an all-rounder (excel in sport/outdoor activities and studies) to be recognized.
Take mathematics (which I believe the language of the universe) for example, addition balanced with substraction, multiplication balanced with division, in fact every operation in math, has it counter-operation.
"So, what's your point?", you may say. My point is, when you are presented with a problem, there will be 2 solution, and the best solution is from the mixture of both. Period.