Somehow most sincere hearts are also most self-doubting.
Take for example my mother-in-law’s.
She was so self-conscious about being a non-native-English speaker when she visited us first time in the US that once she said:
“You know what, it is really different English here. Yesterday I was watching a program on the TV and could not understand a word!”
“Well, mom, you *do* understand a lot of English!”
“But I couldn’t!”
“What program were you watching?”
“Mom, that is a SPANISH program and none in the family knows a word from that language!”