Mary Wollstonecraft Shelley said this quote

Now I am twenty-eight, and am in reality more illiterate than many schoolboys of fifteen. It is true that I have thought more, and that my day dreams are more extended and magnificent; but they want (as the painters call it) keeping; and I greatly need a friend who would have sense enough not to despise me as romantic, and affection enough for me to endeavour to regulate my mind.