'Thou shalt not get found out' is not one of God's commandments; and no man can be saved by trying to keep it.
If that form of government, that system of social order is not wrong - if those laws of the Southern States, by virtue of which slavery exists there, and is what it is, are not wrong - nothing is wrong.
Technique! The very word is like a shriek of outraged Art. It is the idiot name given to effort by those who are too weak, too weary, or too dull to play the game. The mighty have no theory of technique.