I mean, this can be interpreted in both ways.
.
One: you actively choose to stay ignorant.
.
Or two: you strive to learn more every single day, and then realise there is always something more to learn, that there are so many things you don't know about whatever it is that you are interested in, that you realise you will never be a master, yet become a master in the process.
.
The person who strive to learn more always has something to learn. Thus, in his own eyes, he remains stupid with regards to the knowledge of the vast unknown.
But if you know you don't know something, you aren't ignorant, just uneducated. Ignorance is not knowing you don't know, and being willfully ignorant is being so goddamn stupid you don't know you don't know and actively seeking to keep it as such. Ignorance is easy, the other two are more difficult, but being willfully ignorant takes the cake, as it takes some serious mental jumping jacks to pull it off.
.
One: you actively choose to stay ignorant.
.
Or two: you strive to learn more every single day, and then realise there is always something more to learn, that there are so many things you don't know about whatever it is that you are interested in, that you realise you will never be a master, yet become a master in the process.
.
The person who strive to learn more always has something to learn. Thus, in his own eyes, he remains stupid with regards to the knowledge of the vast unknown.