your/somebody's heart is not in it
(one's) heart isn't in it
One is not emotionally invested in something. I used to love running, but my heart just isn't in it anymore—that's why I quit the track team this year. I can tell by the way you wrote this that your heart wasn't in it. Is something distracting you?
See also: heart
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
your/somebody’s ˈheart is not in itsomebody does not give all their enthusiasm, interest and energy to something: He agreed to write the book for a large sum of money, but his heart wasn’t in it, and it was never finished.
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