I've liked a lot of the quotes, but this one is kind of off-putting ... it suggests that best friends should never end the relationship, regardless of whether that relationship becomes just as toxic as that of a boyfriend or someone else. Women especially are shamed for failing friendships, because of the "you should be nurturing!" aspect society pressures females to have. Well, it was thought-provoking. Kudos!
It's from when Luke first meet him, and he tries to lift the ship from the swamp. Luke is saying it's impossible, Yoda says it is, and that he has to do it again. Luke then says he is trying, and Yoda is all "Do or do not, there is no try."