In the realm of ideas everything depends on enthusiasm... in the real world all rests on perseverance.

In the realm of ideas everything depends on enthusiasm... in the real world all rests on perseverance.

在思想领域，一切都取决于热情……在现实世界中，一切都取决于毅力。

-- Johann Wolfgang von Goethe 约翰·沃尔夫冈·冯·歌德