Discourse on the Method of Rightly Conducting One's Reason and of Seeking Truth in the Sciences

I think, therefore I am.

我思故我在。

I was convinced I had advanced no farther in all my attempts at learning, than the discovery at every turn of my own ignorance.

我深信，我在所有求学的尝试中并未更进一步，只是在每个转折处发现了自己的无知。