上句见：Day337
The Story of Philosophy《哲学的故事》第1章Plato第7节VI. The Psychological Solution第2段第3句：

We must begin by "sending out into the country all the inhabitants of the city who are more than ten years old, and by taking possession of the children, who will thus be protected from the habits of their parents"(540). We cannot build Utopia with young people corrupted at every turn by the example of their elders. We must start, so far as we can, with a clean slate. It is quite possible that some enlightened ruler will empower us to make such a beginning with some part or colony of his realm. (One ruler did, as we shall see.) in any case we must give to every child, and from the outset, full equality of educational opportunity; there is no telling where the light of talent or genius will break out; we must seek it impartially everywhere, in every rank and race. The first turn on our road is universal education.
浙江大学译本：我们必须尽量从零开始。

解析

1、We must start, so far as we can, with a clean slate.
我们必须尽可能重新开始。
slate: a type of hard rock that splits easily into thin layers石板；
a clean slate/sheet: a situation in which everything bad or wrong that you have done in the past is forgiven or forgotten, and you can make a new start
start/begin with a clean slate/sheet：重新开始；改过自新
At the beginning of a new year, some people like to start with a clean slate.新年伊始，有些人喜欢重新开始。

这句道出了关键，乌托邦就是重新开始，而不是在现有的修修补补。