I have often thought, when I was abroad, that if there were no other arguments to prove original sin, the rising of wolves and tigers against man, nay, the barking of a dog against us, is a proof of original sin. Tigers and lions durst not rise against us unless it were as much as to say, "You have sinned against God, and we take up our master's quarrel." If we look inwardly, we shall see enough of lusts and man's temper contrary to the temper of God. There is pride, malice, and revenge in all our hearts; and this temper can not come from God; it comes from our first parent, Adam, who, after he fell from God, fell out of God into the devil. However, therefore, some people may deny this, yet when conviction comes, all carnal reasonings are battered down immediately, and the poor soul begins to feel and see the fountain from which all the polluted streams do flow. When the sinner is first awakened, he begins to wonder, How came I to be so wicked? The Spirit of God then strikes in, and shows that he has no good thing in him by nature; then he sees that he is altogether gone out of the way, that he is altogether become abominable, and the poor creature is made to lie down at the foot of the throne of God and to acknowledge that God would be just to damn him, just to cut him off, tho he never had committed one actual sin in his life. Did you ever feel and experience this, any of you--to justify God in your damnation--to own that you are by nature children of wrath, and that God may justly cut you off, tho you never actually had offended Him in all your life? If you were ever truly convicted, if your hearts were ever truly cut, if self were truly taken out of you, you would be made to see and feel this. And if you have never felt the weight of original sin, do not call yourselves Christians. I am verily persuaded original sin is the greatest burden of a true convert; this ever grieves the regenerate soul, the sanctified soul. The indwelling of sin in the heart is the burden of a converted person; it is the burden of a true Christian. He continually cries out: "Oh! who will deliver me from this body of death, this indwelling corruption in my heart?" This is that which disturbs a poor soul most. And, therefore, if you never felt this inward corruption, if you never saw that God might justly curse you for it, indeed, my dear friends, you may speak peace to your hearts, but I fear, nay, I know, there is no true peace. Further, before you can speak peace to your hearts you must not only be troubled for the sins of your life, the sins of your nature, but likewise for the sins of your best duties and performances.