Steel (one's) heart against (someone or something) informal verb phrase
To refrain from feeling compassion and kindness for someone or something.
Her ex-boyfriend caused untold suffering, which steeled her heart against other people.
She had to steel her heart against pity for fear of being hurt.
For her own benefits, she steeled her heart against people.
To stop talking or thinking about something.
To try to imagine how would you feel if you were in someone's else situation
The verb "steel" should be conjugated according to its tense.
If you swallow the bait, you take something that someone offers you, or agree to do something that someone asks you to do without knowing that it is a trick or way of getting something from you.
You can't just do whatever he wants you to do. Don't swallow the bait.