Authors:

Footsteps in the snow suggest where you have been, point to where you were going: but when they suddenly vanish, never dismiss the possibility of flight.

Diane Duane (2003). “A Wizard Alone”, p.11, Houghton Mifflin Harcourt
Footsteps in the snow suggest where you have been, point to where you were going: but when they suddenly vanish, never dismiss the possibility of flight.