Let me remind you that freedom consists not in the absence of external constraints, but in the animal in us being governed by the will, for when the flesh is free the man is a slave. And it means that the will should be governed by the conscience; and it means that the conscience should be governed by God. These are the stages. Men are built in three stories, so to speak. Down at the bottom, and to be kept there, are inclinations, passions, lust, desires, all which are but blind aimings after their appropriate satisfaction, without any question as to whether the satisfaction is right or wrong; and above that a dominant will which is meant to control, and above that a conscience. That is the pyramid; and as by the sunshine on the gilded top of some spire, the shining apex, the conscience, is illnmined when the light of God falls upon it. And when a man is built in that fashion, and keeps to that fashion, then, and only then, is he free. I need not remind you of how the metaphor of my text receives its most tragical and yet most common illustration and confirmation in the awful fact of the power of any evil thing, once thought or done by a man, to reproduce itself, onwards and ever onwards. It is a far commoner thing for a man never to have done some given evil, never to have got drunk, never to have stolen, or the like, than to have done it only once. I have heard of a mysterious illness, in which at first medical analysis detected with difficulty one single bacterion in a great quantity of blood. But in a few days, so had they multiplied that no drop could be taken anywhere from the veins which was not full of them. That is how men get under the slavery of any evil thing; and habit becomes stronger than anything except that "strong Son of God, immortal Love," whose Spirit can conquer even it." Can the Ethiopian change his skin, or the leopard his spots? Then may ye that are wont to do evil learn to do well." The bondage is real and hard. My text suggests to us that strange, sad fact­ II. OUR IGNORANCE OF OUR SLAVERY.