Lightarted Living: Been Down So Long, Don't Remember how to feel Good?

Lightarted Living: Been Down So Long, Don't Remember how to feel Good?:   'Happiness comes into our lives through doors we don’t even remember leaving open' Robert Brault 

Sometimes when you've been down so long you don't even remember what it feels like to be up. But sometimes--when you least expect it--happiness and good times show up on your doorstep. Then what? How do you act? What do you do?