have someone's interests at heart

to be concerned about and want to help ( someone ) He claims that he has her ( best ) interests at heart.

ارزش و بها قائل بودن برای کسی

خیر و صلاح کسی را خواستن، خیرخواه کسی بودن. مثال:
She told him she only had his interests at heart.
He has your best interests at heart, you know.