Like Death, The Tower symbolises the end of the current state. Unlike Death it does not necessarily promise the birth of something new. If badly aspected this can be the worst card of the Tarot deck.

The Tower always indicates upheavel, possibly chaos, loss and destruction. Its effects are never pleasant and can be painful.

The card illustrates lightning striking the Tower. The lightning cannot be avoided, the destruction it brings is inevitable. All we can do is attempt to survive and rebuild.

The Tower brings sudden, severe change. It is up to us whether or not we harness that opportunity to build a bigger, better Tower for the future.

When the Tower appears in a Tarot spread it represents sudden and possibly violent change, disruption or loss. This loss must be interpreted with regard to the other cards in the spread to determine who will be struck be the lightning and how they will cope with the experience.

That which does not kill us makes us stronger?

I have always seen the Tower as a card of disaster that either we know is coming or we have done something that we know will lead to ruin. I have tried to portray this with the opening of the Devil's Gate... not that Sam and Dean could have known Azazel's plans, but they both made choices that led to this outcome. Jake also made the conscious choice to follow old Yellow Eyes, leading to the Gate being opened.

However, we also have to remember that if the Gate hadn't been opened, John Winchester never would have been able to pull himself out of hell so quickly. And because the Winchester boys were there the Gate was closed relatively quickly and Azazel's ultimate downfall was brought about. So, while the Tower can bring upheavel and distruction, there is also some good that may come from it. It certainly should make you more self-aware and responsible for your actions.