In her book Joni, she relates how she visited faith healers many times and prayed desperately for the healing which never came. Finally, she accepted her condition as God’s will, and she writes, "The more I think about it, the more I’m convinced that God doesn’t want everyone well. He uses our problems for His glory and our good" (p. 190).
Sa huli, natanggap niya na ang kanyang karamdaman ay kalooban ng Diyos at kanyang isinulat, habang pinagiisipan ko ang aking kalagayan, mas lalo akong nakumbinsi na hindi kalooban ng Diyos na gumaling ang lahat ng tao. Ginagamit Niya ang ating mga problema para sa Kanyang kaluwalhatian at para sa ating ikabubuti (Joni, pahina 190).