2.19 A logical picture can depict the world.

Can it? See comment on 2.063. What is "the world"? Have we been told yet in terms that have been explained without reference to other unexplained terms? Cf. 2.171. Maybe what it can depict is just some bit of the world, so that "picturing the world" means picturing stuff. If so, this remark does not seem very informative.