Understanding is not absolutely final.
What's now right could be wrong later.
Only in some very special cases is comprehension the point of reading-in things like recipes and "reading material." The point of reading is understanding, and comprehension is to understanding as getting wet is to swimming. You must do the one before you can hope to do the other, but you don't do the other simply because you do the one.
Reading Plato should be easy; understanding Plato can be difficult.
Beauty is something that changes your life, not something you understand.