Empirical results show that Keynes' state of confidence is an important monetary policy transmission channel in the eurozone. This confidence channel operates via the short-term interest rate rather than the Eurosystem balance sheet total and is most marked for investment versus private consumption and for industry compared to services. The findings are robust across alternative variables for monetary policy and for the confidences of borrowers and lenders, the addition of other transmission variables, and across sample period. Psychological motives among borrowers and lenders are thus important for monetary policy transmission and economic growth.