This is the best graffiti message I've seen since I spotted “refuse to be led” spray-painted on a fence further along the very same train line. Good advice; I was sorry to see it cleaned off. This current message brings an Emily Dickinson poem to mind.
Hope is the Thing with Feathers(by Emily Dickinson)
Hope is the thing with feathers
That perches in the soul,
And sings the tune--without the words,
And never stops at all,
And sore must be the storm
That could abash the little bird
That kept so many warm.
And on the strangest sea;
Yet, never, in extremity,
It asked a crumb of me.