Whatever your discipline, become a student of excellence in all things. Take every opportunity to observe people who manifest the qualities of mastery. These models of excellence will inspire you and guide you toward the fulfillment of your highest potential. – Tony Buzan
Astronomers always work in the past; because light takes time to move from one place to another, they see things as they were, not as they are. – Neale E. Howard, The Telescope Handbook and Star Atlas, 1967