Some examples of inspirational get-well wishes are "Sleep, riches and health to be truly enjoyed must be interrupted" by Johan Paul Fredrich Rickter and "Time is the best doctor," which is a Yiddish proverb. In the Bible, Proverbs 17:22 states "A cheerful heart is good medicine."
Two more examples of get-well wishes are "Recover well, to be strong and sound. Rest well, to walk on the path to good health" and "As you are healing, may you feel warmth and compassion from all who care about you. Best wishes that you will soon be back to doing all the things you love."