"A man’s home is his castle" is a principle rooted in Exodus. In Exodus 22:2-3, we read: "If the thief is found breaking in, and he is struck so that he dies, there shall be no guilt for his bloodshed. If the sun has risen on him, there shall be guilt for his bloodshed. He should make full restitution; if he has nothing, then he shall be sold for his theft." On this passage, Matthew Henry writes: "If a thief broke a house in the night, and was killed in the doing of it, his blood was upon his own head, and should not be required at the hand of him that shed it, v. 2. As he that does an unlawful act bears the blame of the mischief that follows to others, so likewise of that which follows to himself. A man's house is his castle, and God's law, as well as man's, sets a guard upon it; he that assaults it does so at his peril. Yet, if it was in the day-time that the thief was killed, he that killed him must be accountable for it (v. 3), unless it was in the necessary defence of his own life. Note, We ought to be tender of the lives even of bad men; the magistrate must afford us redress, and we must not avenge ourselves."