I'm running out of things to say about the sketches. Maybe I'll think of something better later, or then again maybe I'll just start posting sans text.
Jessie asked if this sketch has to do with a story, and yes, it kind of does, in a second-hand way. The story of Abraham and Isaac has been a very popular theme throughout the history of art, I suppose partly because it is very dramatic. So I guess this sketch uses that imagery, although it obviously isn't really about Abraham or Isaac. Here are some links to past depictions of this story by Caravaggio, Rembrandt, Brunelleschi, and Chagall. There are many, many more out there.