harden your heart
US /ˈhɑːr.dən jʊər hɑːrt/
UK /ˈhɑːr.dən jʊər hɑːrt/

1.
mengeraskan hati, menjadi tidak berperasaan
to become less sympathetic or emotionally unresponsive to others' suffering or pleas
:
•
She tried to harden her heart to his pleas, but she couldn't.
Dia cuba mengeraskan hatinya terhadap rayuannya, tetapi dia tidak dapat.
•
You must harden your heart if you want to survive in this business.
Anda mesti mengeraskan hati anda jika anda ingin bertahan dalam perniagaan ini.