使用现在分词短语 transforming the soul 作后置定语修饰 tools，简洁有力地表达了书籍的功能属性。
Books are the tools for transforming the soul. What humanity needs is nourishing food rich in inspiration. And reading is precisely this kind of nourishment — Hugo
Books are lighthouses standing in the ocean of time — Whipple
Books — the true university of our contemporary era — Carlyle
Books inspired my wisdom and soul; they helped me escape from the stinking mud. Without them, I would have drowned in it, choked by stupidity and vulgarity — Gorky
Books are like a divine lamp, illuminating the most distant and dim paths of life — Upton
Books possess immortal power. They are the most lasting fruit of human activity — Smiles
Ideal books are the keys to wisdom — Leo Tolstoy
Books are the life of our era — Belinsky
Books are a great force — Lenin
Books — treasures of the whole world — Thoreau
Good books are the most precious treasures — Belinsky
Books are the only thing that does not die — Chute
Books make people the masters of the universe — Pavlyenko
Within books lies the entire soul of the past — Carlyle
The influence of a person is brief and weak, while the influence of a book is extensive and profound — Pushkin
书籍便是这种改造灵魂的工具。人类所需要的，是富有启发性的养料。而阅读，则正是这种养料——雨果
书籍是屹立在时间的汪洋大海中的灯塔——惠普尔
书籍——当代真正的大学——卡莱尔
书籍鼓舞了我的智慧和心灵，它帮助我从腐臭的泥潭中脱身出来，如果没有它们，我就会溺死在那里面，会被愚笨和鄙陋的东西呛住——高尔基
书籍就像一盏神灯，它照亮人们最遥远最黯淡的生活道路——乌皮特
书籍具有不朽的能力。它是人类活动的最长久的果实——史美尔斯
理想的书籍是智慧的钥匙——列夫·托尔斯泰
书是我们时代的生命——别林斯基
书籍是巨大的力量——列宁
书籍——举世之宝——梭罗
好的书籍是最贵重的珍宝——别林斯基
书是唯一不死的东西——丘特
书籍使人们成为宇宙的主人——巴甫连柯
书中横卧着整个过去的灵魂——卡莱尔
人的影响短暂而微弱，书的影响则广泛而深远——普希金