follow (one's) heart

Translations
следовать за сердцем
She was torn between taking a high-paying job or pursuing her passion, but she decided to follow her heart.
Она колебалась между высокооплачиваемой работой и занятием по душе, но решила следовать за своим сердцем.
Definitions
To act according to one's own feelings, desires, or intuition, rather than following logic, external advice, or societal expectations.