with (one's) hand on (one's) heart(redirected from with one's hand on one's heart)
with (one's) hand on (one's) heart
Giving the assurance or impression that one is being completely truthful, genuine, or sincere. With my hand on my heart, I can say that we have only ever acted in the best interests of our customers. She stood their with her hand on her heart and lied to our faces.