The entire world is based off of perspective. The most advanced questions are quenched with perspective, and without it, the world would be very different. The universe, and its biggest structures and foundations of life, are all built on perspective, without perspective we would know absolutely nothing. Wisdom only comes through by knowing the perspection of an object and its nature.
We do not see things as they are, we see them as we are.what is important? the answer to that question is all about perspective, because one "important" person in ones life, like ones parent for example, will not be important at all for another, and in that case the person who said that their mother/father was important's answer would be false.
Same with time, music, nature, justice, self control, drugs, everything, what is and what isn't, is about your perspective on it.
Halfway empty, or halfway full.