The biggest danger.

"The biggest dangers are those you accept when you commit yourself to anything: that it won’t work out, that you were wrong or deluded or just not up to the task. That kind of disappointment can be soul-crushing; it can change a person into someone they themselves don’t like, if they’re still even capable of seeing themselves clearly. The biggest challenge is to resist turning the hurt inward and creating permanent damage to your character, or turning it outward, creating harm to others. The biggest danger is that you won’t resist and thereby become a smaller person than you might have been." - Frank Gohlke