Let your plans be dark and impenetrable as night, and when you move, fall like a thunderbolt.

The woods are lovely, dark and deep. But I have promises to keep, and miles to go before I sleep.

A rooster crows only when it sees the light. Put him in the dark and he'll never crow. I have seen the light and I'm crowing.

Is it the damned fool, who, at that dark moment, laughs courage right into you.

Walking with a friend in the dark is better than walking alone in the light.

Don't look for a black cat in a dark room, especially if it is not there...

The hardest thing of all is to find a black cat in a dark room, especially if there is no cat.

Their eyes were dark and hard and glowing, with no fear in them, no kindness and no guilt.