The quote suggests that both wise and brave individuals do not passively wait for change or future events to happen; instead, they actively engage with their circumstances. It highlights the importance of taking initiative and being proactive in shaping one's destiny rather than being overwhelmed by external forces.

In the context of the book "Rocket Men: The Daring Odyssey of Apollo 8 and the Astronauts Who Made Man's First Journey to the Moon" by Robert Kurson, this reflects the spirit of the astronauts and those behind the Apollo 8 mission. Their journey to the moon symbolized courage and determination, emphasizing that significant achievements require action and a willingness to face the unknown.