We should be most careful about this Commandment, because almost every violation of it is a mortal sin. For example, if you steal only a little, it is a venial sin; for in stealing the greatness of the sin will depend upon the amount you steal; but if you do a real bad action, or think a real bad thought against the Sixth Commandment, it will be a mortal sin, no matter how short the time. Again, we have more temptations against this Commandment, for we are tempted by our own bodies and we cannot avoid them: hence the necessity of being always guarded against this sin. It enters into our soul through our senses; they are, as it were, the doors of our soul. It enters by our eyes looking at bad objects or pictures; by our ears listening to bad conversation; by our tongue saying and repeating immodest words, etc. If then, we guard all the doors of our soul, sin cannot enter. It would be foolish to lock all the doors in your house but one, for one will suffice to admit a thief, and we might as well leave them all open as one. So, too, we must guard all the senses; for sin can enter by one only as well as by all. 371 Q. What is forbidden by the Sixth Commandment? A. The Sixth Commandment forbids all unchaste freedom with another's wife or husband: also all immodesty with ourselves or others in looks, dress, words, or actions. 372 Q. Does the Sixth Commandment forbid the reading of bad and immodest books and newspapers? A. The Sixth Commandment does forbid the reading of bad and immodest books and newspapers. Reading brings us into the company of those who wrote the book. Now we should be just as careful to avoid a bad book as a bad man, and even more so; for while we read we can stop to think, and read over again, so that bad words read will often make more impression upon us than bad words spoken to us. You should avoid not only bad, but useless books. You could not waste all your time with an idle man without becoming like him--an idler. So if you waste your time on useless books, your knowledge will be just like the books--useless. Many authors write only for the sake of money, and care little whether their book is good or bad, provided it sells well. How many young people have been ruined by bad books, and how many more by foolish books! Boys, for example, read in some worthless book of desperate deeds of highway robbery or piracy, and are at once filled with the desire to imitate the hero of the tale. Young girls, on the other hand, are equally infatuated by the wonderful fortunes and adventures of some young woman whose life has been so vividly described in a trashy novel. As the result of such reading, young persons lose the true idea of virtue and valor of true, noble manhood and womanhood, and with their hearts and minds corrupted set up vice for their model.