“Kiss a lover,
Dance a measure,
Find your name
And buried treasure.
Face your life,
Leave no path untaken.”
― Neil Gaiman
I've found that when the pain of a toothache is over, remembering that pain becomes sort of a pleasure. What does that mean exactly? For one thing it means life is a contrasting experience.
I also remember that the passage of time is affected by pleasure and pain:
Albert Einstein’s secretary was overwhelmed with inquiries as to the meaning of “relativity” that the professor decided to help her out. He told her to answer these inquiries as follows: “When you sit with a nice girl for two hours you think it’s only a minute, but when you sit on a hot stove for a minute you think it’s two hours. That’s relativity.”
Time's true worth is reflected only in what we are doing as it is passing by.