Confucius: To know that we know what we know, and that we do not know what we do not know, that is true knowledge .

To know that we know what we know, and that we do not know what we do not know,  — Confucius

To know that we know what we know, and that we do not know what we do not know, that is true knowledge .

Confucius

Source: Wikiquote (CC BY-SA 3.0). Quotations may be subject to their authors' rights and may be shown in translation.