Growth is the only evidence of life.
--John, Cardinal Newman

We should be thankful we can never reach complete serenity. If we could, we would never have the need to improve ourselves. We would stop growing, because there would be no reason to learn any more than we already know, and we would become bored. Even the things which seem so serene in nature usually contain a struggle within. A lake, with a swan gliding slowly across it, seems a perfect picture of serenity. But, unseen below the surface, fish, turtles, and frogs struggle each day for survival.

The important thing is to accept the struggles as a part of the beauty of life, not as blemishes on it.