Myself acquainted with misfortune, I learn to help the unfortunate.

One should go invited to a friend in good fortune, and uninvited in misfortune

You can't teach anyone anything! Unfortunately they have to learn in a hard way!

Honour him, dear Symparanekromenoi, for his grey hair and his misfortune.

Misfortune tests friends, and detects enemies

It has been my misfortune to be engaged in more battles than any other general on the other side of the Atlantic; but there was never a time during my command when I would not have chosen some settlement by reason rather than the sword.