True as Bob spoken language
Used to emphasize that what you are saying is absolutely true
True as Bob, I used her recipe for this dish.
True as Bob, he is innocent.
Honestly
This phrase is a euphemism for "true as God" and dates from the early 20th century.
The similarity between the children and their parents
I looked at my father's eyes, then looked at my eyes. I thought the apple doesn't fall far from the tree.