God is working in my life all the time. Although having cancer isn't exactly a path I would choose, I can say I wouldn't change it if I could. I've grown so much in my faith and know that although I don't believe God caused this to happen, He will use it as a tool for me to grow in my life, and for me to be of service to others because of my experiences.
I recently came across the following scripture which is really encouraging to me. Sometimes it's really hard to understand the Word of God, and other times it just makes sense, and the Lord reveals just what I need when I need it.
"For all things are for your sakes, that grace, having spread through the many, may cause thanksgiving to abound to the glory of God. Therefore we do not lose heart. Even though our outward man is perishing, yet the inward man is being renewed day by day. For our affliction, which is but for a moment, is working for us a far more exceeding and eternal weight of glory, while we do not look at the things which are seen, but at the things which are not seen. For the things which are seen are temporary, but the things which are not seen are eternal (2 Cor. 4:15-18 NKJV)."
“For in hope we have been saved, but hope that is seen is not hope; for who hopes for what he already sees? But if we hope for what we do not see, with perseverance we wait eagerly for it. In the same way the Spirit also helps our weakness; for we do not know how to pray as we should but the Spirit Himself intercedes for us with groanings too deep for words; and He who searches the hearts knows what the mind of the Spirit is, because He intercedes for the saints according to the will of God (Romans 8:14-27 NASB)."