In Victor Hugo's "Les Miserables," the quote highlights the idea that moral actions are deeply influenced by one's environment and understanding. It suggests that when individuals are left in ignorance or moral darkness, they are more likely to commit wrongdoings. The notion emphasizes the responsibility of society to enlighten and guide those who may be vulnerable to sin.

The quote further asserts that the true guilt lies not primarily with those who act immorally, but with those who create or perpetuate an environment devoid of understanding and morality. By instilling light and knowledge, society can help prevent sin and encourage individuals to make better choices, ultimately fostering a more ethical community.