Letter 94 (§19)

“Again, if a man’s cataract is cured, he cannot, immediately after his recovery, give back their eyesight to other men also; but when we are freed from evil we can free others also. There is no need of encouragement, or even of counsel, for the eye to be able to distinguish different colours; black and white can be differentiated without prompting from another. The mind, on the other hand, needs many precepts in order to see what it should do in life; although in eye-treatment also the physician not only accomplishes the cure, but gives advice into the bargain.”