A common question surrounding the tarot, runes, and other methods of divination is are we able to change the futures that they show us? When we divine, is what we see written in stone? Guaranteed to pass for better or worse? Do our divination tools show us our fates? Frankly, I think Yoda said it best...
"Difficult to see. Always in motion is the future."
I do not believe that we have a single fate that's set in stone, that we are powerless to change. I'm of the belief that we have a hand in writing our own futures - that we can shape our own fates. Every choice we make affects our future, as do outside influences. Everything that happens now causes the future to change, to adapt to the choices and changes made today. The tarot may show us a glimpse of what might come, should we continue on the same path we're currently walking... but that's it. Many times, there's nothing stopping us from changing directions.
This is not to say that we're always in complete control, because again, there will always be outside influences that affect us. We don't generally have control over what other people choose to do, and certainly we can't always control things like weather, natural disasters, illness, and so on. The choices others make can impact our futures - and likewise, the choices we make can impact the futures of those around us.
One of the better ways I've heard it described is likening it to a river. Going with the current is like going with our current fate. Going with the flow, and letting things play out as they've been set up. Going against the current is working against our current fate, changing the situation to avoid a particular outcome.
Sometimes the current is gentle, and we can go against it without issue. However, there will be other times where we're caught in a strong current. Events are set in motion, either by ourselves or by outside influences (or both, in many cases), that form a current that is hard to break away from. We might be able to swim against it, to beat it, but it will be a struggle - and there will be times where we get swept away no matter how hard we try.
Tarot cards and other forms of divination show us what is likely to happen should we continue to go with the flow. Sometimes events unfold that are truly beyond our control, but we're often given many opportunities to shape our own fates.