Set your heart on something

Pro Tip 1/3

Expresses a deep wish or ambition to have or achieve something.

Once she set her heart on becoming a doctor, she studied tirelessly.

Pro Tip 2/3

Shows commitment, not just a passing interest in something.

He's set his heart on collecting every comic book in the series.

Pro Tip 3/3

Implies strong emotional involvement in pursing a goal.

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