Tis the season of giving but Physics professor David Wright seems to be in a giving mood all year round. A student of his at Virginia’s Tidewater Community College, where he’s been teaching since 1974, shared a video collage of his “passionate teaching methods” that has now been viewed 21 million times.

Mr. Wright exudes the joy of teaching—”I feel kind of guilty sometimes, they’re paying me to have fun?” and “I love to come to work” he tells NBC. What a blessing—a gift—he has been to students for four decades.