Outside of the cross of Jesus Christ, there is no hope in this world. That cross and resurrection at the core of the Gospel is the only hope for humanity. Wherever you go, ask God for wisdom on how to get that Gospel in, even in the toughest situations of life.
Change does not fail to occur because of insincerity. The heart patient is not insincere about his wish to keep living, even as he reaches for another cigarette. Change fails to occur because we mean both things. It fails to occur because we are a living contradiction.