How Did Sin Enter the World?

Question #24 If God is completely good, and all things were created by him, how did sin enter the world? Since God is good it would seem philosophically impossible for him to create something sinful, or even something perfect which is able to sin. I know this is kind of a philosophical question, and possibly a very bad one, but please let me know what you think anyway. Answer # 24 You have struck upon the main difficulty in trying to set forth a question of this nature, and that when you say...