clear conscience
US /klɪr ˈkɑn.ʃəns/
UK /klɪr ˈkɑn.ʃəns/

1.
consciência tranquila, consciência limpa
a feeling of guilt-free satisfaction from having done nothing wrong
:
•
After confessing, he finally had a clear conscience.
Depois de confessar, ele finalmente teve a consciência tranquila.
•
I can leave with a clear conscience knowing I did my best.
Posso sair com a consciência tranquila sabendo que fiz o meu melhor.