Again from the Autobiography of Mark Twain:

One day at dinner [painter Frank D.] Millet told a charming little story. On a bleak and sleety day two men were drifting here and there over an old and neglected cemetery, and evidently seeking something. Sometimes they were wide apart, sometimes they crossed each other’s path, and at last they spoke. One said:

“You do not seem to succeed.”

“No.”

“Neither do I.”

“Whom do you seek?”

“The dearest soul, the sweetest nature, the lovingest friend and the faithfulest, a man ever had. And you?”

“I am seeking the hatefulest scoundrel the human race has ever produced; I want to curse his ashes.”

They separated, and searched again far and wide; at last they came together, and together they scraped the moss from a gravestone and revealed the inscription: both had been seeking the same man!

Of course the moral of the story is that there is a good side and a bad side to most people, and in accordance with your own character and disposition you will bring out one of them and the other will remain a sealed book to you.