Johnny's generosity--he would give anything away--his affectionateness and amiability, concealed a considerable sturdiness of character.
from Death Be Not Proud by John Gunther
Gunther uses an appositive phrase set apart by dashes, giving more incite about Johnny and his character. Then, the sentence continues on describing more about him by listing--showing more of what his character was like.
Karen's love--she would care for anybody--her affection and grace, held a sturdiness of character.