So strong has the conviction of the meaning of heredity become that young men, who have themselves borne a burden, imposed by generations of one character or another, have begun to see that it is their duty rather to abstain from marriage than to transmit their unfortunate inheritence to a new generation. I knew a woman in whose family on her father's and mother's side, mental disease was inherited. Therefore, though healthy herself, she refused to marry the man she loved. I know of another who broke her engagement, because she was convinced that the man whom she loved was a drinker, and she did not want to give her children such a father. It is especially on this point that women sin in marrying from ignorance, because they do not know that epilepsy and other diseases, especially alcoholism, are often caused because the child has had a drunkard for a father. A young woman could have no more certain test for the continuance of her feelings for a man, than whether she feels exalted joy or tormenting distress, at the thought of seeing his characteristics transmitted to their child. Men sin against the coming race not only by excessive drinking, but in other respects where the results are still more destructive. Besides the conscience of men must begin to awaken. This will express itself partly in the requirement to abstain from marriage when they know that they have to transmit a bad inheritance, partly in other spheres of morality as in the following examples: A young man, himself a physician, thought he was healthy when he married. He discovered his mistake and found himself confronting the choice of wronging his wife or separating from her. As they were deeply in love, the only possible way was separation. He chose death which he inflicted on himself in such a way that his wife thought it was caused by accident. Another man acted in the same way after he had been married several years and had three children; he found out that he was his wife's half-brother.