Could it be proven when and where he said this? Many other researchers deny that FDR made this statement and that it's a misquotation of the widely reported comment he made in a speech at the Citadel (23 October 1935):
"Yes. we are on the way back — not by mere chance, not by a turn of the cycle. We are coming back more soundly than ever before because we planned it that way, and don't let anybody tell you differently."