It's not because it's difficult that we don't try. It's because we don't try, it's difficult.

It is so tempting to try the most difficult thing possible.

I want to try to make difficult people somehow relatable.

I try to be a nice person, but it's difficult sometimes.

I try to run on the hottest days, at the hottest time, because that's the most difficult time. And sometimes I worry about drying out, and dying.

To try to really land a spacecraft really on another world is really difficult, and if we lose that ability, it's going to be heartbreaking.