Sifting wheat is a violent process. It involves beating the wheat head to release the kernels, then shaking them in a grid that lets the kernels be separated from the chaff. If you were wheat, it was not something that you would want happening to you. Yet, without this sifting, you would miss out on your fullest potential.
God does not bring hardship to our lives, but does use it to bring us to our fullest potential. Jesus even says that he prays for us that we may not fail. He knows the struggles we will have, but He also desires for us to stay committed to Him. This is what He prays for us.
Life will shake us. This is guaranteed. It is through the strength of Christ that we may be shaken but not turn from faith.