When others criticize you, never criticize yourself. @elonmusk With SpaceX's upcoming IPO, I have a video saved on my phone that I use to motivate myself whenever I encounter setbacks. It's from the famous 2012 CBS news program "60 Minutes." In the interview, the host mentioned that Neil Armstrong, the first man on the moon, and Eugene Cernan, the last man on the moon, both testified before Congress against the commercial spaceflight program (i.e., SpaceX's development model at the time). Musk, with tears in his eyes, said, "Those guys are heroes of mine, so it's really tough." But in the end, Musk proved him right with his actions! This action has continued for over a decade! Now, SpaceX is about to go public! Even when you're on the right path, the most difficult obstacles often don't come from competitors, but from those you respect most—friends, family. In times of hardship, the only person you can truly trust is yourself. Endure it, persevere! Believe in your convictions, and then go and achieve it!