"Maybe. Those of us who don't trust so easily have to watch out for one another. Most people tend to think others are good."

That part of Bucky is gone, more or less, because he'd spent too long under HYDRA's control to think people are inherently good any longer. He thinks Finnick and Annie are, though, even if they're as cagey as he is. That's why he'd trusted Finnick with his knife and trusted him enough to come out of the woods on his own terms.

"The world can be a dangerous place. Sometimes you have to tiptoe around it until you can find solid footing. I just wanted to build the bridge for you."