Have (something) at heart verb phrase
Used to refer to something that someone really cares about.
As an athlete, he sure has his body fitness at heart.
A good doctor is one who always has patient's health at heart.
To prove one’s worth or skill
Used to describe valuing something highly.
To highly value someone or something.
The verb "have" should be conjugated according to its tense.
A person who is completely unknown or has no connection with you
The guy I talked to at the prom last night is a perfect stranger.