5. But perhaps the best and most infallible evidence we can have of the truth of our religion in this life is in the steady increase of our secret sinfulness. Christiana had no trouble with her own wicked heart so long as she was a woman of a wicked life. But directly she became a new creature, her heart began to swarm, such is her own expression, with sinful memories, sinful thoughts, and sinful feelings; till she had need of some one ever near her, like Greatheart, constantly to assure her that those cruel and deadly swarms, instead of being a bad sign of her salvation, were the very best signs possible of her good estate. Humility is the foundation of all our graces, and there is no humility so deep and so ever-deepening as that evangelical humility which in its turn rises out of and rests upon secret sinfulness. Not upon acts of secret sin. Do not mistake me. Acts of secret sin harden the heart and debauch the conscience. But I speak of that secret, original, unexplored, and inexpugnable sinfulness out of which all a sinner's actual sins, both open sins and secret, spring; and out of which a like life of open and actual sins would spring in God's very best saints, if only both He and they did not watch night and day against them. Sensibility to sin, or rather to sinfulness, is far and away the best evidence of sanctification that is possible to us in this life. It is this keen and bitter sensibility that secures, amid all oppositions and obstructions, the true saint's onward and upward progress. Were it not for the misery of their own hearts, God's best saints would fall asleep and go back like other men. A sinful heart is the misery of all miseries. It is the deepest and darkest of all dungeons. It is the most painful and the most loathsome of all diseases. And the secrecy of it all adds to the bitterness and the gall of it all. We may know that other men's hearts are as sinful as our own, but we do not feel their sinfulness. We cannot sensibly feel humiliation, bondage, sickness, and self-loathing on account of another man's envy, or ill-will, or resentment, or cruelty, or falsehood, or impurity. All these things must be our own before we can enter into the pain and the shame of them; but, when we do, then we taste what death and hell are indeed. As I write these feeble words about it, a devil's shaft of envy that was shot all against my will into my heart this morning, still, after a whole day, rankles and festers there. I have been on my knees with it again and again; I have stood and looked into an open grave to-day; but there it is sucking at my heart's blood still, like a leech of hell. Who can understand his errors? Cleanse Thou me from secret faults. Create in me a clean heart, O God, O wretched man that I am! "Let a man," says William Law when he is enforcing humility, "but consider that if the world knew all that of him which he knows of himself: if they saw what vanity and what passions