Love’s heralds should be thoughts,
Which ten times faster glide than the sun’s beams,
Driving back shadows over louring hills.

– William Shakespeare

Romeo and Juliet, Act 2, Scene 5. Juliet grows impatient as she waits for her Nurse to return with news from her Romeo. She uses a vivid metaphor to describe how love’s messengers should be thoughts that travel ten times faster than sunbeams that brighten up the hills and drive back the shadows.