If you walk on the edge of the curb on an agreeable night, you will find the going easy at first. Place one foot in front of the other on the yellow paint. But after a while the path becomes dimmer, the way less easy. You might fall off, but likely you will press on, one foot and then the other on the peeling paint. When the street lamps are behind you, your shadow will obscure the way, or a branch may cross your path. You might fall off, or you might push the branch aside and continue walking along the curb. Placing one foot in front of the other, you may lose your balance, and recover. And if you have made it this far, you might notice the curb turning and then, of course, you must hop off and head toward home.