search your heart/soul/conscience

search (one's) heart

To carefully consider or think about one's own emotions about or motivations for something. We're asking upper management to search their hearts and realize that this decision will negatively impact every employee in the company. I know you're hurt right now, but search your heart—you know that breaking up was the right thing to do.
See also: heart, search
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

search your ˈheart/ˈsoul/ˈconscience

(formal) think carefully about your feelings or your reasons for doing something: If I searched my heart I’d probably find that I don’t always tell the truth. ▶ ˈheart-searching, ˈsoul-searching nouns: His divorce forced him to do a lot of soul-searching.
Farlex Partner Idioms Dictionary © Farlex 2017
See also: