True story, it is alleged. Einstein is traveling in the United Kingdom by train. It was of the old-fashioned type, with compartments and a corridor.
When the conductor came to inspect his ticket, Einstein searched all his pockets in vain.
Conductor: “Don’t worry, sir! I know who you are, and Albert Einstein would always buy a ticket.”
The conductor passed on to the next compartment, but, as he looked back, he saw Einstein still searching frantically for his ticket, even getting down on his hands and knees to search under the seats.
Concerned, the conductor went back and reassured him again, “Look, sir, I know who you are and there is no problem.”
Einstein: “Young man, I too know who I am, but unless I find the ticket I don’t know where I’m going.”