have a clear conscience

Idioms and Phrases

Also, have a clean conscience . Feel free of guilt or responsibility. For example, I have a clear conscience—I did all I could to help . This idiom is also put as one's conscience is clear or clean , as in His conscience is clean about telling the whole story . The adjective clear has been used in the sense of “innocent” since about 1400; clean was so used from about 1300.