I saw this for the first time today...

I walked a mile with Pleasure, She chattered all the way; But left me none the wiser, For all she had to say. I walked a mile with Sorrow And ne'er a word said she; But, oh, the things I learned from her When Sorrow walked with me!
Author: Robert Browning Hamilton
Source: Along the Road

This, of course, led to a search for similar quotes. Thanks to WorldofQuotes.com, Here are a few of my favorites today...

Ah, nothing comes to us too soon but sorrow.
Author: Philip James Bailey
Source: Festus (sc. Home)

Men die, but sorrow never dies; The crowding years divide in vain, And the wide world is knit with ties Of common brotherhood in pain.
Author: Susan Coolidge (pseudonym of Sarah Chauncey Woolsey)
Source: The Cradle Tomb in Westminster Abbey

When sparrows build and the leaves break forth My old sorrow wakes and cries.
Author: Jean Ingelow
Source: Song of Old Love