find it in one's heart

Idioms  

1. Persuade oneself to do something, as in They were an hour late, but I couldn't find it in my heart to scold them. This expression, today generally put in the negative, alludes to searching self-examination. [Mid-1400s]

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Example Sentences

One could find it in one’s heart to forgive the yellow brick; but this red, never.

From The Brighton Road The Classic Highway to the South by Harper, Charles G. (Charles George)

“It’s no good, old man,” he says, with a sickly smile, so full of pathos that it is impossible to find it in one’s heart to feel anything but pity for him. 

From Diary of a Pilgrimage by Jerome, Jerome K. (Jerome Klapka)