It’s nev­er too late to thank the teacher who changed your life.

Oprah Win­frey fell to pieces when she was reunit­ed on air with Mrs. Dun­can, her fourth grade teacher, her “first lib­er­a­tor” and “val­ida­tor.”

Patrick Stew­art used his knight­hood cer­e­mo­ny as an occa­sion to thank Cecil Dor­mand, the Eng­lish teacher who told him that Shakespeare’s works were not dra­mat­ic poems, but plays to be per­formed on one’s feet.

And Bill Gates had kind words for Blanche Caffiere, the for­mer librar­i­an at View Ridge Ele­men­tary in Seat­tle, who des­tig­ma­tized his role as a “messy, nerdy boy who was read­ing lots of books.”

One of the most heart­felt stu­dent-to-teacher trib­utes is that of Nobel Prize-win­ning author and philoso­pher Albert Camus to Louis Ger­main, a father sub­sti­tute whose class­room was a wel­come reprieve from the extreme pover­ty Camus expe­ri­enced at home. Ger­main per­suad­ed Camus’ wid­owed moth­er to allow Camus to com­pete for the schol­ar­ship that enabled him to attend high school.