初心

“Shoshin (初心) is a concept in Zen Buddhism meaning “beginner’s mind”. It refers to having an attitude of openness, eagerness, and lack of preconceptions when studying a subject, even when studying at an advanced level, just as a beginner in that subject would.”

Wikipedia

“In the beginner’s mind there are many possibilities, in the expert’s mind there are few.”

Zen Mind, Beginner’s Mind by Shunryu Suzuki