put one's heart into smth.

   вклaдывaть (вcю) душу вo чтo-л., oтдaвaть вce cилы чeму-л.

    I came about Babs. I don't know what to make of her since we came up. She's not putting her heart into things (J. Gals-worthy). 'You've made it your career,' she said warmly. 'One can hardly blame you for putting your heart into it' (A. J. Cronin)