Finally, God gave a warning, and the warning was that in Cain’s refusing to come on God’s terms he was flirting with disaster. The cause of his anger was sin, and sin was about to master him. Is that not our case also? Sin is always crouching at our door; indeed, it is sometimes even across the threshold and entrenched on the hearth. It desires to master us and in many cases has. We must master it. But how? How can we drive the demons of sin out and cleanse this old house in which we live? We cannot