It's been said "the only thing that stays the same is change". Yes, life comes at us fast, and along with life comes change after change after change. Success and happiness depend largely upon our ability to adapt to change and to "roll with the flow".
Compare a white water rafter with the torrent rapids of a river. Which one is in control? the rafter or the river? Who ultimately has the power? the rafter or the river? While the skilled river guide may be equipped with a paddle in hand and knowledge of the rapids to come, he is only going to move in one direction, and that is downstream. He can tweak his velocity, maybe shift a bit, but at the end of the day he is going to move downstream with the river, regardless of his skill level.
How does that illustration teach us something about life?
Well, we may have a paddle in our hand, we may even have multiple paddles, we may have a direction in mind that our life will take. And all of that is great, but... Remember that life will have it's rapids, it will have it's currents, and ultimately in the big picture of things we are along for the ride. Enjoy the ride! Don't fear it. Don't try and fight it. Just enjoy the ride!