Once fairly started on the way to the great knowledge, to doubt is to risk insanity; to come to a dead stop is to fall; to recede is to tumble backward, headlong into an abyss.

一旦诚实地走上通往伟大知识的道路，怀疑就是去冒精神错乱的危险，停滞就会跌落，后退就会摔倒，迅速地坠入深渊。

youdao

Once fairly started on the way to the great knowledge, to doubt is to risk insanity; to come to a dead stop is to fall; to recede is to tumble backward, headlong into an abyss.

一旦诚实地走上通往伟大知识的道路，怀疑就是去冒精神错乱的危险，停滞就会跌落，后退就会摔倒，迅速地坠入深渊。

youdao