There is nothing more beautiful， I think， than the evanescent fleeting images and sentiments presented by a language one is just becoming familiar with--ideas that flit across the mental sky， shaped and tinted by capricious fancy. Miss Sullivan sat beside me at my lessons， spelling into my hand whatever Mr. Irons said， and looking up new words for me. I was just beginning to read Caesar's “Gallic War“ when I went to my home in Alabama.
evanescent 转瞬即逝
tinted adj.着色的，带色彩的；（玻璃）有色的
v.为……轻微染色；染
by capricious fancy 任性的幻想
flit 掠过
flit across the mental sky 穿过思想的天空
spelling into 拼写成