Use the expression 'change my mind'

[O'Dolly]

Business Idiom in English, Intermediate level

ESL/EFL Test #71 "How to disagree", question 8

Nothing in the world will ever make me change my ......... on that subject.

(a) thought
(b) mind
(c) idea
(d) heart

Business Idiom in English, Intermediate level

ESL/EFL Test #71 "How to disagree", answer 8

Nothing in the world will ever make me change my mind on that subject.

Correct answer: (b) mind

Your answer was: incorrect
Nothing in the world will ever make me change my heart on that subject.
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'change my heart ' can be used in the sense of changing the opinion. when to use 'change my mind'?

O'Dolly

[Conchita]

'Change my mind' (not 'my heart') is used to mean 'change my decision' or 'change my point of view': she's changed her mind twice already.

On the other hand, 'change my heart' has a different (often religious) sense and can be interpreted as 'change my spirit/attitude', for example. A change of heart can also mean that your feelings change.