The theme that most people will think of when the Tower appears in a Tarot reading is that something terrible is going to happen which will turn their world completely on its head. Lightning will strike as is often depicted on the card itself. There is definitely an element of truth to this but there is also an important nuance to its message. The Tower is here to keep us on our true path and if you do not make the decision which will do this then the decision will be made for you.