Idiom of the day :- In one’s heart of hearts

Usage, examples and definition of the Idiom :-

‘In my heart of hearts I think you’re the nicest mouse in the entire world,’ Timothy blushed. Accepting his gift, Josephine answered : ‘In my heart of hearts, I think you’re wonderful too.’ When we speak of one’s heart of hearts we are referring to a person’s deep, secret, innermost feelings.