Life is always not plain sailing, it has it's ups and downs. If it is too smooth, it's going to be monotonous. It has to be challenging at times to keep us on the ball and be alert.
We must learn to face difficulties and solve problems as it appears. This is life. A person may be once in a while in a dark tunnel, but as we progress, there is bound to have lights at the other end. There is no dead end.
Life is always an experience. Even at the age of 80, we should still be learning. It's a on-going process. Don't worry, Be Happy.