What feelings did filial piety express to mom and dad?

The sentence "filial piety to parents" expresses a feeling of gratitude and respect, and is usually used to express gratitude and return to parents. It emphasizes the love and respect for parents, but also implies a kind of responsibility and obligation, that is, to do your best to take care of and care for parents.

This sentence may also contain a spirit of self-sacrifice and selfless dedication, which means that you are willing to sacrifice your time and energy to meet your parents' needs and wishes to express your love and gratitude to your parents.

Generally speaking, the sentence "filial piety to parents" conveys an important emotion and value, that is, gratitude, respect and love to parents, and also emphasizes the responsibility and obligation to family relations.