The recent news story of the woman attacked by a chimp has received a lot of attention. The owner of the animal reportedly had treated the chimp as her child. Later she apparently wondered how the animal became so violent. I have an answer for the woman: it's an animal.
Some years ago during a sermon I noted that the nature of an animal is to be an animal and the nature of a sinner is to sin. As I was talking with people who were leaving worship, a woman told me that I didn't know her dog. I responded that I didn't know her dog but that I did know that the nature of a dog is to be a dog just as the nature of a sinner is to sin.
Christians should, of all people, understand the fallen nature of mankind. We should not be surprised that unregenerate people act like unregenerate people. Paul tells us in Romans 3:10ff, "...there is none that is righteous, not even one.." Later in the same chapter he instructs us, "...all have sinned and come short of the glory of God." Why are we so surprised when people who have not trusted Christ alone act in ways that offend God? Until a person trusts Christ, we cannot expect them to behave in ways that please Him.
All the attempts of social reformers and governments to change people apart from Christ are destined for failure. ONLY Jesus Christ can move a man or woman from the category of unregenerate to the glorious position of being "in Christ." That does not mean Christians never sin, but we now recognize our sin (no excuses!) and confess them to Him who forgives (I Jn. 1:9). Our hope is in Christ alone. In Him, we are capable of living to please God because He has changed our nature. We are new creations in Christ (II Cor. 5:17). He make an eternal difference. Believe it and live.