The records of memory are like those pages on which you write with sympathetic ink, which disappears when dry, and seems to leave the page blank. You have only to hold it before the fire, or subject it to the proper chemical process, and at once it stands out legible. You are writing your biography upon the fleshly tables of your heart, my brother; and one day it will all be spread out before you, and you will be bid to read it, and to say what you think of it. The stings of a nettle will burn for days, if they are touched with water. The sting and inflammation of your evil deeds, though it has died down, is capable of being resuscitated, and it will be. What an awful menagerie of unclean beasts some of us have at our doors! What sort of creatures have you tethered at yours? Crawling serpents, ugly and venomous; wild creatures, fierce and bloody, obscene and foul; tigers and bears; lustful and mischievous apes and monkeys? or such as are lovely and of good report,--doves and lambs, creatures pure and peaceable, patient to serve and gentle of spirit? Remember, remember, that what a man soweth--be it hemlock or be it wheat--that, and nothing else, 'shall he reap.' 2. Now, let us look for a moment at the next thought that is here; which is put into a strong, and, to our modern notions, somewhat violent metaphor;--the horrible longing, as it were, of sin toward the sinner: 'Unto thee shall be its desire.' As I explained, these words are drawn from the previous chapter, where they refer to the holy union of heart and affection in husband and wife. Here they are transferred with tremendous force, to set forth that which is a kind of horrible parody of that conjugal relation. A man is married to his wickedness, is mated to his evil, and it has, as it were, a tigerish longing for him, unhallowed and murderous. That is to say--our sins act towards us as if they desired to draw our love to themselves. This is just another form of the statement, that when once a man has done a wrong thing, it has an awful power of attracting him and making him hunger to do it again. Every evil that I do may, indeed, for a moment create in me a revulsion of conscience; but it also exercises a fascination over me which it is hard to resist. It is a great deal easier to find a man who has never done a wrong thing than to find a man who has only done it once. If the wall of the dyke is sound it will keep the water out, but if there is the tiniest hole in it, the flood will come in. So the evil that you do asserts its power over you, or, in the vigorous metaphor of my text, it has a fierce, longing desire after you, and it gets you into its clutches.