On Monday, obstacles became smaller but in focus at the same time. David is obsessed with learning about the universe. The question of who we are and why we exist are things he thinks about. That's why he enjoys watching about Carl Sagan;s video series. Below is clip by Mr. Sagan called Pale Blue Dot.
Whenever David is stressed, he thinks back to this video about how small the earth is in the universe and the problem is insignificant as a result.