Deep Question

The other day I was at my sister's house just hanging out. Her sons (my nephews) were eating lunch. Jake who is 6 and in kindergarten, has a photographic memory. He is amazing at reading already and just so smart. He was eating away and then looks up and says to me,
"Lisa, Do you know Jesus?"
The question made me stop. I really didn't know how to answer him. I'm still thinking about it.
His mom asked him if he knew Jesus and with absolutely no hesitation said "yes"
The faith and knowledge of a child is amazing.