Let your heart rule your head phrase
To do domething based on your emotions rather than for rational reasons
He's really not a good guy to marry, so don't let your heart rule your head.
If you don't know who you truly love, let your heart rule your head.
I can't believe that Tom beat his classmate. He's always the one who let his heart rule his head.
The verb "let" should be conjugated according its tense.