harden heart

harden your heart

(slightly formal)
to make yourself stop feeling kindness and sympathy He found it difficult to harden his heart completely against his old colleague.
See also: harden, heart

harden your heart

  (slightly formal)
to make yourself stop feeling kind or friendly towards someone You've just got to harden your heart and tell him to leave.
See also: harden, heart
References in periodicals archive ?
I also know that there might be a way of going into apparently "no-go" areas without cameras or the mayoral chain or police and that that might help to heal the situation rather than to harden hearts.
What either side gained in the contest for world opinion remains to be seen, and this latest conflict is likely to harden hearts and minds on both sides.
His constant saber-rattling and invocation of international sanctions will only serve to harden hearts and create further mistrust.