Thanking a teacher is good both for the teacher and for the person doing the thanking.

Nobel Prize winner Dr. Oliver Smithies wanted to thank his graduate tutor at Oxford University for making a difference in his life. After he had recorded a video to do just that, we asked him how it made him feel to remember someone who had contributed so much to his significant professional accomplishments. His answer captured a sentiment common among our interview subjects, and his expression of his feeling was charming.