In the book of life, the answers aren't in the back.
Life is as tedious as a twice-told tale Vexing the dull ear of a drowsy man.
William Shakespeare, King John, 3. 4
Life has taught us that love does not consist of gazing at each other, but in looking together in the same direction.
Antoine de Saint-Exupery
There are only two tragedies in life: one is not getting what one wants, and the other is getting it.
The supreme irony of life is that hardly anyone gets out of it alive.
Robert Heinlein, Job: A Comedy of Justice
My momma always said life was like a box of chocolates
you never know what you're gonna get.
Tom Hanks (Forrest Gump), in movie Forrest Gump