Pretty and beautiful are two different things. A pair of eyes may not be pretty, but the look in them can be beautiful. A face that is not very distinctive can have a lovely look, and an imperfect body can have a good posture and manners. It all depends on the richness and openness of a soul. There may be many ways to beautify the soul, but I think reading is an easy, inexpensive, and shortcut that does not require help from others.