Lacan's Passion for Ignorance

I was curious how did Lacan come to this term passion for ignorance because you know he mentions that people don't have a passion for knowledge but rather a passion for ignorance and then he describes it. I started looking into the history when Lacan started first using the term and actually how did he coming to this term? He was attending in the 50s at the Sorbonne lectures on Buddhism and that at that time there was a very famous Indian scholar of Buddhism, Valpula, Rahula who was also lecturing at Sorbonne. They were sort of studying his work and I realized that actually Lacan picked it from Buddhism and kind of interpreted this term in his own work so