My new status as a bus commuter is turning out to be very good for my education indeed. I try to go for the classics when I can as a source of universal truths. Take this essay on Advice to Young People, penned in 1882.
Never handle firearms carelessly. The sorrow and suffering that have been caused through the innocent but heedless handling of firearms by the young! Only four days ago, right in the next farmhouse to the one where I am spending the summer, a grandmother, old and gray and sweet, one of the loveliest spirits in the land, was sitting at her work, when her young grandson crept in and got down an old, battered, and rusty gun which had not been touched for many years and was not supposed to be loaded, and pointed it at her, laughing and threatening to shoot. In her fright she ran screaming and pleading toward the door on the other side of the room; but as she passed him he placed the gun almost next to her very breast and pulled the trigger! He had supposed it was not loaded. And he was right - it wasn't. So there wasn't any harm done. It was the only kind of case that I had ever heard of.
Therefore, just the same, don't meddle with unloaded firearms; they are the most deadly and unerring things that have ever been created by man. You don't have to take any pains at all with them; you don't have to have a rest, you don't have to have any sights on the gun, you don't have to take aim, even. No, you just pick out a relative and bang away, you are sure to get him. A youth who can't hit a cathedral at thirty yards with a Gatling gun in three quarters of an hour, can take up an old empty musket and bang his grandmother every time, at a hundred. Think what Waterloo would have been if one of the armies had been boys armed with old muskets not supposed to be loaded, and the other army had been composed of their female relations. The very thought of it makes one shudder.
- Mark Twain