The description of Horace Danby as "good and respectable — but not completely honest" suggests that while he may have positive qualities and intentions, he is not entirely truthful or ethical in his actions. This description is apt for Horace because of the nature of his crime and his character as depicted in the story "The Blue Cross" by G.K. Chesterton.
Horace Danby is a burglar who steals for noble reasons — to build a private library and improve his mind. He is meticulous in his planning and execution, and he targets only wealthy individuals who are insured, so as not to cause them financial harm. These aspects of his character suggest that he is not motivated by greed or malice, unlike a typical thief.
However, Horace's actions are still dishonest and illegal. Despite his noble intentions, he is breaking the law and violating the rights of others by stealing from them. This complexity in his character, where he exhibits both positive and negative traits, makes him more nuanced than a typical thief who steals purely for personal gain.
In summary, Horace Danby's description as "good and respectable — but not completely honest" is apt because it captures his complex character, which combines positive qualities with dishonest behavior. He cannot be categorized as a typical thief because his motivations and actions are driven by a desire for self-improvement rather than selfishness or malice.