The hardest thing about the road not taken is that you never know where it might have led.
My daughter returned to school full-time this year. It so happened that she needed to switch out of one class for another this week. Upon arriving at the professor's office to request his permission for enrollment in his class, she found that the professor whose class she was leaving shared the same office and there he sat. Talk about awkward.
She wrote Professor 1 a note thanking him for his time and saying that she hoped to have the opportunity to take one of his classes at some future time. She closed with the quote above. Apparently, he was impressed by this and sent her a thank you for the thank you.