I know you all cannot contain yourselves - you must know more about the Devil card. Pictured here is my favorite Devil card by Ciro Marchetti from the Legacy of the Divine deck. It's my favorite not only because Marchetti is a very gifted artist and the deck itself is gorgeous, but also because this card represents how I think of the Devil card better than any other Devil card I've ever seen.
Traditionally, the Devil card shows a man and woman (naked) chained before the throne of a horned goat devil. The lesson of the card is not only that you are trapped, but that the chains around the man's and woman's necks are loose enough that the man or woman could take off their chain themselves anytime. They would simply have to find the will and strength to do so.
The Devil card represents being stuck in unhealthy patterns, such as addiction. I sometimes think of depression as being chained to the Devil's throne (I have rather severe depression and am pretty open about it because I want people to know it's okay to talk about it and get help). When you're chained to the Devil's throne, often you can't even see that you can take your own yoke off with work, determination, and help.
This particular Devil speaks to me because, on the one hand, he has stolen the Fool's time (FYI - you are the Fool, if you didn't see my past Fool entry). He's also taken all of the Fool's tools: the Sword, the Cup, the Wand, and the Coin. That's what I think the Devil feels like. Not so much that you're serving evil or that evil has befallen you, but that you're stuck in a place where all the tools you have don't seem to be working for you, and your time has been sucked away by this perpetual state of helplessness.
As an aside, there's a lot of back and forth about the inverted Pentagram. Here I see the pentagram as being reminiscent of the Hanged Man - a person (arms, legs, head) hanging upside-down caught between the last stage and the next. The inverted Pentagram is not, in itself, inherently satanic, from what I've read. It's when you make one of the five points larger than all the other that it symbolizes imbalance and egocentricity. But, it's hard to argue with popular culture's fascination with it, however it is drawn.
The most important lesson of the Devil is that, even though it feels like you can't, you can get out. That's not to say you won't be stuck in a different situation, or that same situation later. It's just that you're not always going to stay there, and it's important to keep sight of that. The Wheel turns. You're not always crushed beneath it - sometimes you're on top.