Here are some of the promises that have been an encouragement in these days leading up to surgery:
The LORD is my Shepherd. I have everything I need.
Be strong and courageous. Do not be afraid or terrified because of [this cancer], for the LORD your God goes with you; he will never leave you nor forsake you.
...yet I will rejoice in the LORD, I will be joyful in God my Savior. The Sovereign LORD is my strength; he makes my feet like the feet of a deer, he enables me to go on the heights.