To everything there is a bright side and a dark side; and I...

To everything there is a bright side and a dark side; and I hold it to be unwise, unphilosophic, unkind to others, and unhealthy for one's own soul, to form the habit of looking on the dark side. Cheerfulness is to the spiritual atmosphere what sunshine is to the earthly landscape. I am resolved to cherish cheerfulness with might and main.