
Set your heart on something
Strong Desire
Expresses a deep wish or ambition to have or achieve something.

Once she set her heart on becoming a doctor, she studied tirelessly.
No Casual Interest
Shows commitment, not just a passing interest in something.

He's set his heart on collecting every comic book in the series.
Emotional Investment
Implies strong emotional involvement in pursing a goal.

They set their hearts on adopting a child and poured their feelings into the process.
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