Base your answer on the transcript of FDRs March 12, 1933: Fireside Chat 1: On the Banking Crisis https://millercenter.org/the-presidency/presidential-speeches/march-12-1933-fireside-chat-1-banking-crisis

FDRs strategy is to restore confidence and trust in the banking system so that people will leave their money in the banks. Without deposits the banks have nothing to lend and this would make a desperate situation worse. The restoration of trust is based on letting people know that the Federal Reserve would lend money to banks.