I met one of my heroes, John Piper, in the Apple Store. I got to fix his wife's iPhone and while fixing it, I just sincerely thanked him for the impact his work has had on my life. Like, life-changing insights from this man.
I was nervous to meet him. It was so weird hearing, "Hey, Josh, John Piper is out at the Genius Bar, wanna go help him?" He was humble and pleasant and could not take a compliment.