Life is a series of peaks and valleys, unless you insist on being in the middle, where there is little flavor, color, or sound.
Aikido, or probably any martial art is a reflection of your life, I think. The trick is not so much in not having peaks and valleys, but in viewing them in such a way that you don't mind them, or better yet, enjoy them.
Realize that they are a thing that is part of the deal, and in their own way they're a positive thing.
And as said above "This too, shall pass"