What do the following proverbs mean?
- you can't make a silk purse out of a sow's ear
- a hyena cannot know its own stench
- a house divided against itself cannot stand
- you'll never plow a field by turning it over in your mind
- no wind, no waves
- people who live in glass houses shouldn't throw stones

1. You can't make a silk purse out of a sow's ear - you cannot create a fine product from bad materials.
3. A house divided against itself cannot stand - if the members of a group fight each other, the group will disintegrate
6. People who live in glass houses shouldn't throw stones - do not criticize others if you have similar weaknesses yourself. 

Lorna would be the complete subject in this sentence.