Christ Jesus gave his followers a command to heal the sick (see Matthew 10:8), and he was always communicating God’s will. And a loving God would never ask of us something we were not properly prepared to accomplish.
God knows each of us as He created us, as spiritual ideas reflecting divine Love. In the proportion that we attain the spiritually clear understanding that perceives creation in the way that God, good, perceives it, we reflect God’s healing power.
One of the intrinsic qualities of the spiritual understanding that forwards healing is purity. Mary Baker Eddy writes in Science and Health with Key to the Scriptures: “In proportion to his purity is man perfect; and perfection is the order of celestial being which demonstrates Life in Christ, Life’s spiritual ideal” (p. 337).