My best teachers were not the ones who knew all the answers, but those who were deeply excited by the questions they could not answer. (Brian Greene, science professor)
We look to our teachers as authorities, and expect them to know their subject fields well. But, no one can know everything, and the teacher who acknowledges his limits is to be respected more than the “know-it-all.” Teachers who are eager to find answers can instill the same eagerness to discover in their students, and everyone profits from the extended learning.
Intelligent people are always ready to learn (Proverbs 13:15).