If you do not think about the future, you cannot have one.Swan Song (1928) https://books.google.no/books?id=dUqaQlOAu1kC&pg=PA244&lpg=PA244&dq=If+you+do+not+think+about+the+future,+you+cannot+have+one.+Swan+Song&source=bl&ots=w7j33mAdOK&sig=ACfU3U1zg4n51x429PkcF2NE9GRIGb8e8A&hl=ru&sa=X&ved=2ahUKEwilg6Kd1NXkAhXHAhAIHadPA9MQ6AEwD3oECDIQAQ#v=onepage&q=If%20you%20do%20not%20think%20about%20the%20future%2C%20you%20cannot%20have%20one.%20Swan%20Song&f=false