This quote is from one of my favorite books, Letters to a young Poet. I had it on my wall while I was going through chemo. Don't be scared, rather, appreciate the unknown.
“Have patience with everything that remains unsolved in your heart. Try to love the questions themselves. Do not now look for the answers. They cannot now be given to you because you could not live them. It is a question of experiencing everything. At present you need to live the question. Perhaps you will gradually, without even noticing it, find yourself experiencing the answer, some distant day.” -Rilke